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Liu JH, Wen W, Wu ZL, Cai T, Huang YM, Guo QX. Asymmetric three-component Tsuji-Trost allylation reaction enabled by chiral aldehyde/palladium combined catalysis. Chem Sci 2024; 15:10232-10236. [PMID: 38966351 PMCID: PMC11220596 DOI: 10.1039/d4sc02594f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 06/03/2024] [Indexed: 07/06/2024] Open
Abstract
Despite the long-standing exploration of the catalytic asymmetric Tsuji-Trost allylation reaction since the mid-20th century, most reported instances have adhered to a two-component approach. Here, we present a remarkably efficient three-component asymmetric allylation reaction enabled by the collaborative action of chiral aldehyde and palladium. A diverse array of NH2-unprotected amino acid esters, aryl or alkenyl iodides, and allyl alcohol esters exhibit robust participation in this reaction, resulting in the synthesis of structurally diverse non-proteinogenic α-amino acid esters with favorable experimental outcomes. Mechanistic investigations reveal the dominance of the allylation/Heck coupling cascade in reactions involving electron-rich aryl iodides, while the Heck coupling/allylation cascade emerges as the dominant pathway in reactions involving electron-deficient aryl iodides. This chiral aldehyde/palladium combining catalytic system precisely governs the chemoselectivity of C-allylation and N-allylation, the regioselectivity of linear and branched allylation, and the enantioselectivity of C-allylation products.
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Affiliation(s)
- Jian-Hua Liu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Wei Wen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Zhu-Lian Wu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Tian Cai
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Yan-Min Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University Nanning 530001 China
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
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2
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Mei P, Ma Z, Chen Y, Wu Y, Hao W, Fan QH, Zhang WX. Chiral bisphosphine Ph-BPE ligand: a rising star in asymmetric synthesis. Chem Soc Rev 2024; 53:6735-6778. [PMID: 38826108 DOI: 10.1039/d3cs00028a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Chiral 1,2-bis(2,5-diphenylphospholano)ethane (Ph-BPE) is a class of optimal organic bisphosphine ligands with C2-symmetry. Ph-BPE with its excellent catalytic performance in asymmetric synthesis has attracted much attention of chemists with increasing popularity and is growing into one of the most commonly used organophosphorus ligands, especially in asymmetric catalysis. Over two hundred examples have been reported since 2012. This review presents how Ph-BPE is utilized in asymmetric synthesis and how powerful it is as a chiral ligand or even a catalyst in a wide range of reactions including applications in the total synthesis of bioactive molecules.
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Affiliation(s)
- Peifeng Mei
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Rare-Earth Materials Chemistry and Applications & Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Zibin Ma
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Rare-Earth Materials Chemistry and Applications & Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Yu Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Rare-Earth Materials Chemistry and Applications & Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Yue Wu
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Rare-Earth Materials Chemistry and Applications & Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
| | - Wei Hao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Qing-Hua Fan
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Rare-Earth Materials Chemistry and Applications & Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
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3
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Tang Y, Sun X, Tan Y, Wang L, Xiong Y, Guo H. Palladium-Catalyzed (4 + 1) Annulation of 4-Vinylbenzodioxinones with Sulfur Ylides: Diastereoselective Synthesis of Dihydrobenzofuran Derivatives. J Org Chem 2024; 89:8951-8959. [PMID: 38814141 DOI: 10.1021/acs.joc.4c00912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Palladium-catalyzed (4 + 1) annulation of 4-vinylbenzodioxinones with sulfur ylides has been developed to afford various dihydrobenzofuran derivatives in moderate to high yields with excellent diastereoselectivities. The scale-up reaction and further derivations of the product worked well, demonstrating the application potential of the current reaction in organic synthesis.
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Affiliation(s)
- Yi Tang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Xiaojing Sun
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Yu Tan
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Lan Wang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Yanmei Xiong
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
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4
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Yang X, Zhang B, Ruan J, Duanmu K, Chen W. Palladium-Catalyzed Allylation of Endocyclic 1-Azaallyl Anions. J Org Chem 2024; 89:8896-8905. [PMID: 38856706 DOI: 10.1021/acs.joc.4c00743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Endocyclic 1-azaallyl anions engage allyl acetates in a palladium-catalyzed allylation followed by reduction to give unprotected 2-(hetero)aryl-3-allylpiperidines and 2-allyl-3-arylmorpholines, products not easily accessible by other means. The allyl group is then readily transformed into a variety of functional groups. Preliminary studies on the asymmetric variant of the reaction using an enantiomerically pure BI-DIME-type ligand provide the product with moderate enantioselectivity. Computational studies suggest that energy barriers of inner-sphere reductive elimination and outer-sphere nucleophilic substitution are almost the same, which makes both of them possible reaction pathways. In addition, the inner-sphere mechanism displays an enantiodiscriminating C-C bond forming step, while the outer-sphere mechanism is much less selective, which combined to give the asymmetric variant of the reaction moderate enantioselectivity.
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Affiliation(s)
- Xiaoyu Yang
- School of Chemical Science and Engineering, Institute for Advanced Studies, Tongji University, 1239 Siping Rd, Shanghai 200092, P. R. China
| | - Biao Zhang
- School of Chemical Science and Engineering, Institute for Advanced Studies, Tongji University, 1239 Siping Rd, Shanghai 200092, P. R. China
| | - Junhao Ruan
- School of Chemical Science and Engineering, Institute for Advanced Studies, Tongji University, 1239 Siping Rd, Shanghai 200092, P. R. China
| | - Kaining Duanmu
- School of Chemical Science and Engineering, Institute for Advanced Studies, Tongji University, 1239 Siping Rd, Shanghai 200092, P. R. China
| | - Weijie Chen
- School of Chemical Science and Engineering, Institute for Advanced Studies, Tongji University, 1239 Siping Rd, Shanghai 200092, P. R. China
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5
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Joseph E, Brar DS, Stuhlsatz G, Tunge JA. Transition metal-free decarboxylative olefination of carboxylic acid salts. Chem Sci 2024; 15:9353-9360. [PMID: 38903232 PMCID: PMC11186341 DOI: 10.1039/d4sc01905a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 04/30/2024] [Indexed: 06/22/2024] Open
Abstract
The cost-effective and efficient synthesis of alkenes is highly significant due to their extensive applications in both synthetic and polymer industries. A transition metal-free approach has been devised for the chemoselective olefination of carboxylic acid salts. This modular approach provides direct access to valuable electron-deficient styrenes in moderate to good yields. Detailed mechanistic studies suggest anionic decarboxylation is followed by halogen ion transfer. This halogen transfer leads to an umpolung of reactant electronics, allowing for a rate-limiting rebound elimination.
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Affiliation(s)
- Ebbin Joseph
- Department of Chemistry, The University of Kansas 1567 Irving Hill Road Lawrence Kansas USA
| | - Deshkanwar S Brar
- Department of Chemistry, The University of Kansas 1567 Irving Hill Road Lawrence Kansas USA
| | - Gaven Stuhlsatz
- Department of Chemistry, The University of Kansas 1567 Irving Hill Road Lawrence Kansas USA
| | - Jon A Tunge
- Department of Chemistry, The University of Kansas 1567 Irving Hill Road Lawrence Kansas USA
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6
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Shimazumi R, Tobisu M. Unimolecular Fragment Coupling: A New Bond-Forming Methodology via the Deletion of Atom(s). JACS AU 2024; 4:1676-1695. [PMID: 38818052 PMCID: PMC11134393 DOI: 10.1021/jacsau.3c00827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/25/2024] [Accepted: 02/26/2024] [Indexed: 06/01/2024]
Abstract
Unimolecular fragment coupling (UFC) is defined as a reaction format, wherein atom(s) located in the middle of a molecule are extruded, and the remaining fragments are coupled. UFC is a potentially powerful strategy that is an alternative to transition-metal-catalyzed cross-coupling because the target chemical bond is formed in an intramolecular fashion, which is inherently beneficial for chemoselectivity and stereoselectivity issues. In this Perspective, we will present an overview of the recent advances in UFC reactions, which encompass those proceeding through the elimination of CO2, CO, SO2, isocyanates, N2, or single atoms primarily via transition metal catalysis.
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Affiliation(s)
- Ryoma Shimazumi
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Mamoru Tobisu
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Innovative
Catalysis Science Division, Institute for Open and Transdisciplinary
Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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7
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Ippoliti FM, Wonilowicz LG, Adamson NJ, Darzi ER, Donaldson JS, Nasrallah DJ, Mehta MM, Kelleghan AV, Houk KN, Garg NK. Total Synthesis of Lissodendoric Acid A. Angew Chem Int Ed Engl 2024:e202406676. [PMID: 38695853 DOI: 10.1002/anie.202406676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Indexed: 07/04/2024]
Abstract
We describe a full account of our synthetic strategy leading to the first total synthesis of the manzamine alkaloid lissodendoric acid A . These efforts demonstrate that strained cyclic allenes are valuable synthetic building blocks and can be employed efficiently in total synthesis.
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Affiliation(s)
- Francesca M Ippoliti
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Chemistry, Hamline University, St. Paul, Minnesota, 55104, USA
| | - Laura G Wonilowicz
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Nathan J Adamson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Discovery Chemistry, Genentech, Inc., South San Francisco, CA 94080, USA
| | - Evan R Darzi
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- ElectraTect, Inc., Phoenix, AZ 85004, USA
| | - Joyann S Donaldson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Pfizer Oncology Medicinal Chemistry, San Diego, CA 92121, USA
| | - Daniel J Nasrallah
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Chemistry, Roanoke College, Salem, Virginia, 24153, USA
| | - Milauni M Mehta
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Small Molecule Therapeutic Discovery, Amgen Research, Amgen Inc., Thousand Oaks, CA 91320, USA
| | - Andrew V Kelleghan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Gilead Sciences Medicinal Chemistry, Foster City, CA 94404, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
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8
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Tang Y, Huang M, Ding S, Liu X, Huyang X, Wang B, Guo H. Palladium-Catalyzed Enantioselective [4+2] Cycloaddition of 4-Vinylbenzodioxinones with Barbiturate-Derived Alkenes: Con-struction of Chiral Spirobarbiturate-Chromanes. Chemistry 2024; 30:e202400302. [PMID: 38380868 DOI: 10.1002/chem.202400302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/16/2024] [Accepted: 02/19/2024] [Indexed: 02/22/2024]
Abstract
In this paper, Pd-catalyzed [4+2] decarboxylative cycloaddition of 4-vinylbenzodioxinones with barbiturate-derived alkenes has been developed, leading to various spirobarbiturate-chromane derivatives in high yields with excellent diastereo- and enantioselectivities. The scale-up reaction and further derivation of the product were demonstrated. A plausible reaction mechanism was also proposed.
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Affiliation(s)
- Yi Tang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, 2 West Yuanmingyuan Road, Beijing, 100193, P. R., China
| | - Mingxia Huang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, 2 West Yuanmingyuan Road, Beijing, 100193, P. R., China
| | - Siyuan Ding
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, 2 West Yuanmingyuan Road, Beijing, 100193, P. R., China
| | - Xinyao Liu
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, 2 West Yuanmingyuan Road, Beijing, 100193, P. R., China
| | - Xiaochun Huyang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, 2 West Yuanmingyuan Road, Beijing, 100193, P. R., China
| | - Bo Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, 2 West Yuanmingyuan Road, Beijing, 100193, P. R., China
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9
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Zheng J, Hua R, Wang YE, Lin T, Ou M, Wu Y, Shi EH, He J, Xiong D, Mao J. Synthesis of Homoallylamines Enabled by Cobalt or Palladium Catalyzed Allylic Substitution of Azaarylmethylamines. Org Lett 2024; 26:2982-2986. [PMID: 38602341 DOI: 10.1021/acs.orglett.4c00551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Pd(OAc)2/Nixantphos or CoI2/Nixantphos catalyzed allylic substitutions with weakly acidic C(sp)3-H bonds of azaarylmethylamines are described. This method facilitates access to various kinds of heteroaryl rings containing homoallylamines (39 examples, 30-98% yields) with excellent functional group tolerance and diastereoselectivity. Compared with the Pd/Nixantphos complex, the Co/Nixantphos catalysis could obtain the cyclic products with good to excellent diastereoselectivities. Importantly, the CoI2/(R,R)-Me-Duphos catalyzed reactions exhibit moderate enantioselectivity. Additionally, the scalability of this transformation is successfully demonstrated.
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Affiliation(s)
- Jiali Zheng
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Rui Hua
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Yan-En Wang
- College of Science, Hebei Agricultural University, Baoding 071000, P. R. China
| | - Tingzhi Lin
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Mingjie Ou
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Yu Wu
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - En-Hao Shi
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Jing He
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Dan Xiong
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Jianyou Mao
- School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
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10
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Wang L, Yang S, Tang Y, Li K, Lu M, Guo H. Palladium-Catalyzed [5 + 4] Cycloaddition of 4-Vinyl-4-Butyrolactones with N-Tosyl Azadienes: Construction of Nine-Membered Ring. J Org Chem 2024; 89:5019-5028. [PMID: 38502934 DOI: 10.1021/acs.joc.4c00245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
In this paper, we reported the palladium-catalyzed formal [5 + 4] cycloaddition reactions between 4-vinyl-4-butyrolactones (VBLs) and azadienes. Under mild reaction conditions, a wide range of benzofuran-fused 9-membered heterocyclic compounds had been provided in moderate to excellent yields with exclusive regioselectivities and excellent diastereoselectivities. The practical applicability of the synthesis was demonstrated through scale-up reaction and further transformation.
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Affiliation(s)
- Lan Wang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Sen Yang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yi Tang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Kuan Li
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Mengxi Lu
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Hongchao Guo
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
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11
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Sateesh R, Prudhviraj J, Priyanka C, Punna N. Access to CF 3-benzofulvenes via palladium-catalyzed cascade arylation/Trost-Oppolzer cyclization/double-bond isomerization. Chem Commun (Camb) 2024; 60:3551-3554. [PMID: 38456328 DOI: 10.1039/d3cc06082a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Herein, we demonstrated a Pd-catalyzed cascade reaction that involves arylation, Trost-Oppolzer type Alder ene reaction, and double bond isomerization using the 4-(2-alkynylphenyl)-allylcarbonates and aryl boronic acids. This cascade process delivers a wide array of distinctive functionalized CF3-benzofulvenes in good yields with high stereoselectivity (E). A single palladium catalyst orchestrates the two individual reactions in a single operation. Trost-Oppolzer type Alder ene reaction is the key in this transformation, also called a rare acid-free iso-Nazarov type cyclization.
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Affiliation(s)
- Rami Sateesh
- Fluoro-Agro Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Jaggaraju Prudhviraj
- Fluoro-Agro Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Chiliveru Priyanka
- Fluoro-Agro Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Nagender Punna
- Fluoro-Agro Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India.
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201 002, India
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12
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Ibrahim AA, O'Reilly SCJ, Bottarel M, Kerrigan NJ. Asymmetric synthesis of enantioenriched α-allyl esters through Pd(BINAPHANE)-catalysed allylation of disubstituted ketenes. Chem Commun (Camb) 2024; 60:3283-3286. [PMID: 38421221 DOI: 10.1039/d4cc00057a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Pd2dba3·CHCl3 (2.5 mol%)-BINAPHANE (5 mol%) was used to promote the first catalytic enantioselective allylation of disubstituted ketenes to give α-allyl esters. The ester products were formed in good to excellent yields (61-93% yield for 13 examples, 16 examples in all), with moderate to good enantioselectivity (68-80% ee for 7 examples).
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Affiliation(s)
- Ahmad A Ibrahim
- Department of Chemistry, Oakland University, 2200 N. Squirrel Rd, Rochester, MI 48309, USA
| | - Stephen C J O'Reilly
- School of Chemical Sciences and Life Sciences Institute, Dublin City University, Glasnevin, Dublin 9, Ireland.
| | - Margot Bottarel
- School of Chemical Sciences and Life Sciences Institute, Dublin City University, Glasnevin, Dublin 9, Ireland.
| | - Nessan J Kerrigan
- School of Chemical Sciences and Life Sciences Institute, Dublin City University, Glasnevin, Dublin 9, Ireland.
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13
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Dong Y, Yang S, Tang Y, Li K, Liu J, Yang F, Zhang C, Guo H. Palladium-Catalyzed [3 + 2] Cycloaddition of 4-Vinyl-4-butyrolactones with Ketenes Generated in Situ from Acyl Chlorides: A Method for the Synthesis of Dihydrofurans. Org Lett 2024; 26:2057-2061. [PMID: 38426714 DOI: 10.1021/acs.orglett.4c00315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
In this paper, palladium-catalyzed [3 + 2] cycloaddition of 4-vinyl-4-butyrolactones with ketenes generated from easily available acyl chlorides was achieved. With Pd2(dba)3·CHCl3/XantPhos as the catalyst, the reaction proceeded smoothly under mild reaction conditions, affording a series of 2,3-dihydrofurans in moderate to high yields. The scale-up reaction and further transformations of the products are demonstrated, and a plausible mechanism is proposed as well.
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Affiliation(s)
- Yujie Dong
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Sen Yang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Yi Tang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Kuan Li
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Jun Liu
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Fazhou Yang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Cheng Zhang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
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14
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Yu TT, Huang PT, Chen BH, Zhong YJ, Han B, Peng C, Zhan G, Huang W, Zhao Q. Construction of 3,4-Dihydroquinolone Derivatives through Pd-Catalyzed [4+2] Cycloaddition of Vinyl Benzoxazinanones with α-Alkylidene Succinimides. J Org Chem 2024; 89:3279-3291. [PMID: 38377542 DOI: 10.1021/acs.joc.3c02728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
The construction of 3,4-dihydroquinolone derivatives has attracted a considerable amount of attention due to their extensive applications in medicinal chemistry. In this study, we present the Pd-catalyzed [4+2] cycloaddition of vinyl benzoxazinanones with α-alkylidene succinimides for the efficient synthesis of 3,4-dihydroquinolones. This approach presents numerous advantages, including the ready availability of starting materials, mild reaction conditions without the use of additional bases, and a wide range of substrates. In particular, all of the desired products can be easily afforded in high yields (≤99%) and excellent diastereoselectivities (>20:1). The practicality and reliability of this strategy were demonstrated by the successful scale-up synthesis and subsequent straightforward synthetic transformations.
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Affiliation(s)
- Ting-Ting Yu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Peng-Ting Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Ben-Hong Chen
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Ya-Jun Zhong
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Bo Han
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Gu Zhan
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Wei Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Qian Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Basic Medical Sciences, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
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15
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Bodnar AK, Szewczyk SM, Sun Y, Chen Y, Huang AX, Newhouse TR. Comprehensive Mechanistic Analysis of Palladium- and Nickel-Catalyzed α,β-Dehydrogenation of Carbonyls via Organozinc Intermediates. J Org Chem 2024; 89:3123-3132. [PMID: 38377547 PMCID: PMC11000628 DOI: 10.1021/acs.joc.3c02572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Introducing degrees of unsaturation into small molecules is a central transformation in organic synthesis. A strategically useful category of this reaction type is the conversion of alkanes into alkenes for substrates with an adjacent electron-withdrawing group. An efficient strategy for this conversion has been deprotonation to form a stabilized organozinc intermediate that can be subjected to α,β-dehydrogenation through palladium or nickel catalysis. This general reactivity blueprint presents a window to uncover and understand the reactivity of Pd- and Ni-enolates. Within this context, it was determined that β-hydride elimination is slow and proceeds via concerted syn-elimination. One interesting finding is that β-hydride elimination can be preferred to a greater extent than C-C bond formation for Ni, more so than with Pd, which defies the generally assumed trends that β-hydride elimination is more facile with Pd than Ni. The discussion of these findings is informed by KIE experiments, DFT calculations, stoichiometric reactions, and rate studies. Additionally, this report details an in-depth analysis of a methodological manifold for practical dehydrogenation and should enable its application to challenges in organic synthesis.
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Affiliation(s)
- Alexandra K Bodnar
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Suzanne M Szewczyk
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Yang Sun
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Yifeng Chen
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Anson X Huang
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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16
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Liang Q, Cai Y, Jiang W, Pang M, Fan L, Zhang G. Palladium-catalyzed allylation and carbonylation: access to allylhydrazones and allyl acylhydrazones. Chem Commun (Camb) 2024; 60:1638-1641. [PMID: 38235749 DOI: 10.1039/d3cc05531k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
A palladium-catalyzed allylation of hydrazines with allyl alcohols and aldehydes was developed, enabling the syntheses of a series of allylhydrazones in good to excellent yields with high regioselectivity. Furthermore, the four-component tandem allylation carbonylation of hydrazines with allyl alcohols and aldehydes was established using the catalytic system, producing various allyl acylhydrazones. Additionally, the functionalized allyl acylhydrazones could be smoothly constructed with the catalytic system employing allylhydrazones as a partner. The catalytic system exhibited good functional tolerance with excellent regioselectivities and scaled-up capability, overcoming the limitations of chemoselectivity of the multicomponent transformation and poor conversion of the weak nucleophile.
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Affiliation(s)
- Qianqian Liang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yan Cai
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030001, China
| | - Wenjun Jiang
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030001, China
| | - Mengdi Pang
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030001, China
| | - Liming Fan
- School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030001, China
| | - Guoying Zhang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, China.
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17
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Tang Y, Zhang R, Dong Y, Yu S, Wu Y, Xiao Y, Guo H. 4-Vinylbenzodioxinones as a new type of precursor for palladium-catalyzed (4+3) cycloaddition of azomethine imines. Chem Commun (Camb) 2024; 60:1436-1439. [PMID: 38206119 DOI: 10.1039/d3cc06012h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
In this paper, benzo-fused cyclic carbonates were designed and synthesized as a new type of precursor of π-allylpalladium zwitterionic intermediates, and were applied in Pd-catalyzed diastereo- and enantioselective (4+3) cycloaddition with C,N-cyclic azomethine imines, leading to various biologically important 1,3,4-benzoxadiazepine derivatives in 43-99% yields with 6 : 1 to >20 : 1 dr and up to 95% ee.
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Affiliation(s)
- Yi Tang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, China.
| | - Rulei Zhang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, China.
| | - Yujie Dong
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, China.
| | - Songcheng Yu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Yongjun Wu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, China
| | - Yumei Xiao
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, China.
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, China.
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18
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Karthick M, Gupta S, Ramanathan CR. Decarboxylative Iodination and Suzuki-Miyaura Coupling Reactions to Access Chiral 3,3'-Diaryl-1,1'-bi-2-naphthols. J Org Chem 2024; 89:291-303. [PMID: 38064439 DOI: 10.1021/acs.joc.3c02020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
An efficient synthesis of the enantiomerically pure 3,3'-bis-arylated BINOLs is accomplished through decarboxylative iodination of the dimethyl ether derivative of BINOL-3,3'-dicarboxylic acid followed by Suzuki-Miyaura coupling using a one-pot protocol. The decarboxylative iodination is effected with the dimethyl ether derivative of BINOL-3,3'-dicarboxylic acid using iodine as a terminal oxidant and the cheaply available K3PO4 as a base under neat conditions. This protocol facilitated the introduction of the aryl group at the 3,3'-position on the binaphthyl system using aryl boronic acid through a palladium-catalyzed Suzuki-Miyaura coupling reaction.
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Affiliation(s)
| | - Sushmita Gupta
- Department of Chemistry, Pondicherry University, Puducherry 605 014, India
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19
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Fu C, He L, Xu H, Zhang Z, Chang X, Dang Y, Dong XQ, Wang CJ. Modular access to chiral bridged piperidine-γ-butyrolactones via catalytic asymmetric allylation/aza-Prins cyclization/lactonization sequences. Nat Commun 2024; 15:127. [PMID: 38167331 PMCID: PMC10762176 DOI: 10.1038/s41467-023-44336-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 12/08/2023] [Indexed: 01/05/2024] Open
Abstract
Chiral functionalized piperidine and lactone heterocycles are widely spread in natural products and drug candidates with promising pharmacological properties. However, there remains no general asymmetric methodologies that enable rapid assemble both critical biologically important units into one three-dimensional chiral molecule. Herein, we describe a straightforward relay strategy for the construction of enantioenriched bridged piperidine-γ-butyrolactone skeletons incorporating three skipped stereocenters via asymmetric allylic alkylation and aza-Prins cyclization/lactonization sequences. The excellent enantioselectivity control in asymmetric allylation with the simplest allylic precursor is enabled by the synergistic Cu/Ir-catalyzed protocol; the success of aza-Prins cyclization/lactonization can be attributed to the pivotal role of the ester substituent, which acts as a preferential intramolecular nucleophile to terminate the aza-Prins intermediacy of piperid-4-yl cation species. The resulting chiral piperidine-γ-butyrolactone bridged-heterocyclic products show impressive preliminary biological activities against a panel of cancer cell lines.
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Affiliation(s)
- Cong Fu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Ling He
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Hui Xu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin, 300072, China
| | - Zongpeng Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Xin Chang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Yanfeng Dang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin, 300072, China.
| | - Xiu-Qin Dong
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.
| | - Chun-Jiang Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.
- State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, China.
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20
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Zebrowski P, Monkowius U, Waser M. Cooperative Chiral Lewis Base/Palladium-Catalyzed Asymmetric Syntheses of Methylene-Containing δ-Lactams. European J Org Chem 2023; 26:e202300982. [PMID: 38601429 PMCID: PMC11005102 DOI: 10.1002/ejoc.202300982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/19/2023] [Indexed: 04/12/2024]
Abstract
We herein report a two-step approach for the enantioselective synthesis of novel chiral δ-lactams. By using a cooperative chiral ITU/achiral Pd-catalyst system, this protocol proceeds via an asymmetric α-allylation of activated aryl esters first, followed by an acid-mediated lactam formation. A variety of differently substituted products could be obtained with usually high levels of enantioselectivities and in reasonable yields (16 examples, up to 98 : 2 er and 73 % yield over two steps). In addition, further utilizations of the products via transformations of the exocyclic double bond were successfully carried out as well.
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Affiliation(s)
- Paul Zebrowski
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Uwe Monkowius
- School of EducationChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
| | - Mario Waser
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
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21
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Liu Y, Zhu L, Li X, Cui Y, Roosta A, Feng J, Chen X, Yao P, Wu Q, Zhu D. Photoredox/Enzymatic Catalysis Enabling Redox-Neutral Decarboxylative Asymmetric C-C Coupling for Asymmetric Synthesis of Chiral 1,2-Amino Alcohols. JACS AU 2023; 3:3005-3013. [PMID: 38034963 PMCID: PMC10685423 DOI: 10.1021/jacsau.3c00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 10/04/2023] [Accepted: 10/04/2023] [Indexed: 12/02/2023]
Abstract
Photocatalysis offers tremendous opportunities for enzymes to access new functions. Herein, we described a redox-neutral photocatalysis/enzymatic catalysis system for the asymmetric synthesis of chiral 1,2-amino alcohols via decarboxylative radical C-C coupling of N-arylglycines and aldehydes by combining an organic photocatalyst, eosin Y, and carbonyl reductase RasADH. Notably, this protocol avoids using any sacrificial reductants. A possible reaction mechanism proposed is that the transformation proceeds through sequential photoinduced decarboxylative radical addition to an aldehyde and a photoenzymatic deracemization pathway. This redox-neutral photoredox/enzymatic strategy is promising not only for effective synthesis of a series of chiral amino alcohols in a green and sustainable manner but also for the design of other novel C-C radical coupling transformations for the synthesis of bioactive molecules.
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Affiliation(s)
- Yiyin Liu
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Liangyan Zhu
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Xuemei Li
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Yunfeng Cui
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Atefeh Roosta
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Jinhui Feng
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Xi Chen
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Peiyuan Yao
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Qiaqing Wu
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
| | - Dunming Zhu
- National
Engineering Research Center of Industrial Enzymes and Tianjin Engineering
Research Center of Biocatalytic Technology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of
Sciences, Tianjin 300308, China
- National
Technology Innovation Center for Synthetic Biology, Tianjin 300308, China
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22
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Davies AM, Londhe SS, Smith ER, Tunge JA. Single-Step Synthesis of γ-Ketoacids through a Photoredox-Catalyzed Dual Decarboxylative Coupling of α-Oxo Acids and Maleic Anhydrides. Org Lett 2023. [PMID: 37991504 DOI: 10.1021/acs.orglett.3c03258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
A photocatalytic methodology for the single step synthesis of γ-ketoacids from α-ketoacids has been developed. This method employs maleic anhydrides as traceless synthetic equivalents of acrylic acids, achieving a selective cross-coupling via a dual decarboxylative strategy, where molecular CO2 is released as the only waste byproduct. The method has also been expanded to incorporate a highly regioselective, 3-component coupling with various alcohols to access functionalized γ-ketoesters.
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Affiliation(s)
- Alex M Davies
- Department of Chemistry, The University of Kansas, 1567 Irving Hill Rd., Lawrence, Kansas 66045, United States
| | - Shrikant S Londhe
- Department of Chemistry, The University of Kansas, 1567 Irving Hill Rd., Lawrence, Kansas 66045, United States
| | - Emma R Smith
- Department of Chemistry, The University of Kansas, 1567 Irving Hill Rd., Lawrence, Kansas 66045, United States
| | - Jon A Tunge
- Department of Chemistry, The University of Kansas, 1567 Irving Hill Rd., Lawrence, Kansas 66045, United States
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23
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Huang W, Yang J, Gao K, Wang Z, Huang G, Yao W, Yang J. Construction of Enantioenriched Quaternary C-Cl Oxindoles through Palladium-Catalyzed Asymmetric Allylic Substitution with Chloroenolates. J Org Chem 2023; 88:15298-15310. [PMID: 37831540 DOI: 10.1021/acs.joc.3c01811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
A palladium-catalyzed asymmetric chloroenolate allylation with vinyl benzoxazinanones under mild reaction conditions has been developed, affording a series of optically active 3,3-disubstituted oxindoles exhibiting a chloro-group and a linear aryl amino side chain in good yields with up to 96% ee. Versatile functional group tolerance on the benzene ring has been demonstrated, and the utility of this method was probed by a scale-up synthesis and highlighted by product derivatizations.
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Affiliation(s)
- Wen Huang
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, P. R. China
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Jingjie Yang
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, P. R. China
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Kai Gao
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Zhiming Wang
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Guobo Huang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Weijun Yao
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, P. R. China
| | - Jianguo Yang
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
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24
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Joseph E, Hernandez RD, Tunge JA. Cobalt-Catalyzed Decarboxylative Allylations: Development and Mechanistic Studies. Chemistry 2023; 29:e202302174. [PMID: 37467152 PMCID: PMC10592299 DOI: 10.1002/chem.202302174] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/21/2023]
Abstract
In recent years, there has been a concerted drive to develop methods that are greener and more sustainable. Being an earth-abundant transition metal, cobalt offers an attractive substitute for commonly employed precious metal catalysts, though reactions engaging cobalt are still less developed. Herein, we report a method to achieve the decarboxylative allylation of nitrophenyl alkanes, nitroalkanes, and ketones employing cobalt. The reaction allows for the formation of various substituted allylated products in moderate-excellent yields with a broad scope. Additionally, the synthetic potential of the methodology is demonstrated by the transformation of products into versatile heterocyclic motifs. Mechanistic studies revealed an in situ activation of the Co(II)/dppBz precatalyst by the carboxylate salt to generate a Co(I)-species, which is presumed to be the active catalyst.
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Affiliation(s)
- Ebbin Joseph
- Department of Chemistry, The University of Kansas, 1567 Irving Rd., Lawrence, KS 66045, USA
| | - Rafael D. Hernandez
- Department of Chemistry, The University of Kansas, 1567 Irving Rd., Lawrence, KS 66045, USA
| | - Jon A. Tunge
- Department of Chemistry, The University of Kansas, 1567 Irving Rd., Lawrence, KS 66045, USA
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25
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Sun L, Li J, Wu Y, Li Y, Chen J, Xia X, Yuan C, Guo H, Mao B. Palladium-catalyzed [4 + 2] cycloaddition of 2-methylidenetrimethylene carbonate or methylene cyclic carbamate with sulfamate-derived cyclic imines. Org Biomol Chem 2023; 21:8107-8111. [PMID: 37801030 DOI: 10.1039/d3ob01361h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
A palladium-catalyzed [4 + 2] cycloaddition of 2-methylidenetrimethylene carbonate or methylene cyclic carbamate with sulfamate-derived cyclic imines has been successfully developed under mild reaction conditions, affording pharmacologically interesting oxazine or hydropyrimidine derivatives in high yields (up to 99% yield). Furthermore, the cycloaddition reactions could be efficiently scaled up and several synthetic transformations were accomplished for the construction of other useful 1,3-oxazine and hydropyrimidinone derivatives.
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Affiliation(s)
- Li Sun
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, P. R. China.
| | - Jiyu Li
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, P. R. China.
| | - Yafei Wu
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, P. R. China.
| | - Ying Li
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, P. R. China.
| | - Junqi Chen
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, P. R. China.
| | - Xiaoye Xia
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, P. R. China.
| | - Chunhao Yuan
- School of Chemistry and Pharmaceutical Engineering, Shandong First Medical University, Shandong Academy of Medical Sciences, Taian 271016, Shandong, P. R. China
| | - Hongchao Guo
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, China.
| | - Biming Mao
- School of Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250117, Shandong, P. R. China.
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26
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Das A, Jonathan C, Saha R, Ahmed MI, Bhowmik S. Regioselective Decarboxylative Transformations of Tetrahydro-β-carboline-1-carboxylic Acid: Reagent Controlled Selectivity toward Alkynylated or Enaminone Products. Org Lett 2023; 25:7310-7315. [PMID: 37791996 DOI: 10.1021/acs.orglett.3c02636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
A one-pot, regioselective decarboxylative alkynylation of tetrahydro-β-carboline-1-carboxylic acid under peroxide-free condition is reported. The reaction is highly selective for the 1-position over the 3-position of tetrahydro-β-carboline. The reaction can afford alkynylated or enaminone products depending on the reagent. The reaction proceeds through sequential decarboxylative iminium ion formation followed by an alkynylation and oxidative rearrangement cascade.
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Affiliation(s)
- Arka Das
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Christine Jonathan
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Rana Saha
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Md Imran Ahmed
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
| | - Subhendu Bhowmik
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, 168 Maniktala Main Road, Kolkata-700054, West Bengal, India
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27
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Bhattacharyya H, Saha S, Verma K, Punniyamurthy T. Redox-Neutral Site-Selective C-H Allylation and Iodolactonization of Benzoic Acids Using Morita-Baylis-Hillman Adducts in Water. Org Lett 2023; 25:6830-6834. [PMID: 37682011 DOI: 10.1021/acs.orglett.3c02318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
A Ru-catalyzed carboxylate directed C-H allylation and iodolactonization of benzoic acids has been accomplished with Morita-Baylis-Hillman adducts as the coupling partner in environmentally benign water as solvent. The redox-neutral conditions, use of water as a solvent, substrate scope, functional group tolerance, and mutation of natural products and drug molecules are the important practical features.
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Affiliation(s)
- Hemanga Bhattacharyya
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Sharajit Saha
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Kshitiz Verma
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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28
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Mondal S, Chatterjee N, Maity S. Recent Developments on Photochemical Synthesis of 1,n-Dicarbonyls. Chemistry 2023; 29:e202301147. [PMID: 37335758 DOI: 10.1002/chem.202301147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/19/2023] [Accepted: 06/19/2023] [Indexed: 06/21/2023]
Abstract
1,n-dicarbonyls are one of the most fascinating chemical feedstocks finding abundant usage in the field of pharmaceuticals. Besides, they are utilized in a plethora of synthesis in general synthetic organic chemistry. A number of 'conventional' methods are available for their synthesis, such as the Stetter reaction, Baker-Venkatraman rearrangement, oxidation of vicinal diols, and oxidation of deoxybenzoins, synonymous with unfriendly reagents and conditions. In the last 15 years or so, photocatalysis has taken the world of synthetic organic chemistry by a remarkable renaissance. It is fair to say now that everybody loves the light and photoredox chemistry has opened a new gateway to organic chemists towards milder, more simpler alternatives to the previously available methods, allowing access to many sensitive reactions and products. In this review, we present the readers with the photochemical synthesis of a variety of 1,n-dicarbonyls. Diverse photocatalytic pathways to these fascinating molecules have been discussed, placing special emphasis on the mechanisms, giving the reader an opportunity to find all these significant developments in one place.
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Affiliation(s)
- Subhashis Mondal
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
| | - Nirbhik Chatterjee
- Department of Chemistry, Kanchrapara College, North 24 Parganas, 743145, West Bengal, India
| | - Soumitra Maity
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
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29
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Do TH, Phaenok S, Soorukram D, Modjinou T, Grande D, Nguyen TTT, Nguyen TB. Synthesis of Thioureas, Thioamides, and Aza-Heterocycles via Dimethyl-Sulfoxide-Promoted Oxidative Condensation of Sulfur, Malonic Acids, and Amines. Org Lett 2023; 25:6322-6327. [PMID: 37606344 DOI: 10.1021/acs.orglett.3c02247] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Malonic acid and derivatives have been well-known to undergo monodecarboxylation under relatively mild conditions and have been exclusively used as a C2 synthon. We report herein their new application as a C1 synthon via double decarboxylation promoted by sulfur and dimethyl sulfoxide. In the presence of amines as nucleophiles, a wide range of thioureas and thioamides as well as N-heterocycles were obtained in good to excellent yields under mild heating conditions.
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Affiliation(s)
- Trung Hieu Do
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Supasorn Phaenok
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Tina Modjinou
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Daniel Grande
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Thi Thanh Tam Nguyen
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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30
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Dong Y, Liu J, Li K, Han S, Liang B, Yang F, Yu S, Wu Y, Zhang C, Guo H. Palladium-Catalyzed Asymmetric (3 + 2) Cycloaddition of 5-Allenyloxazolidine-2,4-Diones with Barbiturate-Derived Alkenes: Synthesis of Spirobarbiturate-γ-Lactams. Org Lett 2023; 25:6328-6333. [PMID: 37610081 DOI: 10.1021/acs.orglett.3c02242] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
The 5-allenyloxazolidine-2,4-diones had been synthesized as novel precursors of π-allyl palladium zwitterion and were applied in a palladium-catalyzed enantioselective (3 + 2) annulation by using barbiturate-derived alkenes as the reaction partner in the presence of an axially chiral phosphoramidite ligand. This reaction proceeded smoothly under mild reaction conditions, affording highly functionalized spirobarbiturate-γ-lactam derivatives in excellent yields along with high diastereo- and enantioselectivities. The scale-up reaction and further transformation of the product were also successful.
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Affiliation(s)
- Yujie Dong
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Jun Liu
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Kuan Li
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Sheng Han
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Bo Liang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Fazhou Yang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Songcheng Yu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Yongjun Wu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Cheng Zhang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Hongchao Guo
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
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31
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Shimazumi R, Tanimoto R, Tobisu M. Nickel/Photoredox Dual-Catalyzed Conversion of Allyl Esters to Ketones via the Formal Deletion of Oxygen. Org Lett 2023; 25:6440-6445. [PMID: 37594903 DOI: 10.1021/acs.orglett.3c02606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
Abstract
We report herein the catalytic conversion of allylic esters into the corresponding ketones by the formal deletion of an oxygen atom. The key to the success of the reaction is the dual use of nickel and photoredox catalysts; the former mediates C-O bond activation and C-C bond formation, while the latter is responsible for deoxygenation of the acyloxy group using PPh3 as a stoichiometric reductant. Catalytic replacement of an oxygen atom of an allyl ester with a tethered alkene is also accomplished.
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Affiliation(s)
- Ryoma Shimazumi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Riku Tanimoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Mamoru Tobisu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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32
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Day CS, Ton SJ, Kaussler C, Vrønning Hoffmann D, Skrydstrup T. Low Pressure Carbonylation of Benzyl Carbonates and Carbamates for Applications in 13 C Isotope Labeling and Catalytic CO 2 Reduction. Angew Chem Int Ed Engl 2023; 62:e202308238. [PMID: 37439487 DOI: 10.1002/anie.202308238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 07/14/2023]
Abstract
Herein, we report a methodology to access isotopically labeled esters and amides from carbonates and carbamates employing an oxygen deletion strategy. This methodology utilizes a decarboxylative carbonylation approach for isotope labeling with near stoichiometric, ex situ generated 12 C, or 13 C carbon monoxide. This reaction is characterized by its broad scope, functional group tolerance, and high yields, which is showcased with the synthesis of structurally complex molecules. A complementary method that operates by the catalytic in situ generation of CO via the reduction of CO2 liberated during decarboxylation has also been developed as a proof-of-concept approach that CO2 -derived compounds can be converted to CO-containing frameworks. Mechanistic studies provide insight into the catalytic steps which highlight the impact of ligand choice to overcome challenges associated with low-pressure carbonylation methodologies, along with rational for the development of future methodologies.
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Affiliation(s)
- Craig S Day
- Carbon Dioxide Activation Center (CADIAC), The Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus, Denmark
| | - Stephanie J Ton
- Carbon Dioxide Activation Center (CADIAC), The Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus, Denmark
| | - Clemens Kaussler
- Carbon Dioxide Activation Center (CADIAC), The Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus, Denmark
| | - Daniel Vrønning Hoffmann
- Carbon Dioxide Activation Center (CADIAC), The Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus, Denmark
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center (CADIAC), The Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus, Denmark
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33
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Gao Y, Wang H, Chen X, Qiao Y, Miao Z. Gold and Palladium Relay Catalytic [4 + 4] Cycloadditions of Enynamides and γ-Methylene-δ-valerolactones: Diastereoselective Construction of Furan-Fused Azacyclooctanes. J Org Chem 2023; 88:11822-11833. [PMID: 37534854 DOI: 10.1021/acs.joc.3c01114] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
We report a highly efficient and diastereoselective gold and palladium sequential relay catalysis system for the synthesis of furan-fused eight-membered heterocycles. Employing a one-pot procedure, easily accessible enynamides undergo cyclization to generate azadienes in situ, which subsequently participate in diastereoselective formal [4 + 4] cycloadditions with γ-methylene-δ-valerolactones. This strategy enables the rapid and efficient construction of a series of furan-fused azacyclooctanes with diverse substituents in good yields (63-97%) and a high level of diastereoselectivity (7:1 → 20:1 dr).
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Affiliation(s)
- Yanfeng Gao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Hui Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Xiaoquan Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Yiyang Qiao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
| | - Zhiwei Miao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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34
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Zhou Q, Yin ZW, Wu ZL, Cai T, Wen W, Huang YM, Guo QX. Asymmetric α-Allylation of N-Unprotected Amino Acid Esters with 1,3-Disubstituted Allyl Acetates Enabled by Chiral-Aldehyde/Palladium Catalysis. Org Lett 2023; 25:5790-5794. [PMID: 37523673 DOI: 10.1021/acs.orglett.3c02027] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
A chiral aldehyde/palladium catalysis-enabled asymmetric α-allylation of NH2-unprotected amino acid esters with 1,3-disubstituted allyl acetates is described in this work. With the utilization of different chiral phosphine ligands, both the anti- and syn-selective allylation reactions are achieved enantioselectively. A series of α,α-disubstituted amino acid esters bearing two adjacent chiral centers are produced in moderate-to-excellent yields, diastereoselectivities, and enantioselectivities.
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Affiliation(s)
- Qing Zhou
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zhi-Wei Yin
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zhu-Lian Wu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Tian Cai
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Wei Wen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Yan-Min Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, 530001, China
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
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35
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Chen LY, Li J. Skeletal Editing of Dibenzolactones to Fluorenes via Ni- or Pd-Catalyzed Decarboxylation. J Org Chem 2023; 88:10252-10256. [PMID: 37406152 PMCID: PMC10528846 DOI: 10.1021/acs.joc.3c00700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
The skeletal editing of dibenzolactones to fluorenes by Ni- or Pd-catalyzed decarboxylation is reported. In contrast to previously reported intramolecular decarboxylative couplings, inductively electron-withdrawing ortho substituents on the aryl carboxylate moiety and metal additives are not required. The decarboxylation reaction proceeds cleanly and can be applied to the skeletal editing of a natural product analogue. Mechanistic observations are consistent with stabilization of the carboxylate-ligated Ni complex over the Ni-carboxylate ion pair, which is the key factor in promoting the challenging decarboxylation step in the catalytic cycle.
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Affiliation(s)
- Liang-Yu Chen
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Junqi Li
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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36
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Doi R, Kajiwara K, Negoro T, Koh K, Ogoshi S. Regioselective C-F Bond Transformations of Silyl Difluoroenolates. Org Lett 2023. [PMID: 37466250 DOI: 10.1021/acs.orglett.3c02057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Herein, we report the development of a nickel-catalyzed cross-coupling reaction of silyl difluoroenolates with aryl zinc reagents via C-F bond cleavage. Treatment of a stoichiometric amount of Ni(0)/N-heterocyclic carbene (NHC) with silyl difluoroenolates in the presence of a lithium salt resulted in C-F bond cleavage to selectively afford the corresponding (Z)-alkenyl Ni complexes. On the basis of the observations, we developed a catalytic cross-coupling reaction that selectively delivers a single geometric isomer of a fluoroenolate.
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Affiliation(s)
- Ryohei Doi
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Koki Kajiwara
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Taiki Negoro
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kenta Koh
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sensuke Ogoshi
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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37
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Wu F, Li Z, Fu C, Wang G, Zheng C, Wu X. Synergistic Ni/Pd Catalysis for Asymmetric Allylic Alkylation of 2-Acyl Imidazoles. Org Lett 2023. [PMID: 37450617 DOI: 10.1021/acs.orglett.3c01726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
The asymmetric α-allylation of α-aryl-substituted 2-acetyl imidazoles synergistically catalyzed by Ni/Pd catalysts has been developed. In this process, the nickel-bisoxazoline complex activates the enolate of an acetyl imidazole, which then reacts with a π-allyl palladium electrophile generated from an allyl alcohol derivative by a palladium-based catalyst. A broad scope of substrates was suitable for this reaction. The utility of this method was demonstrated by a gram-scale reaction and subsequent elaboration of the allylation products.
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Affiliation(s)
- Fan Wu
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai Univerversity, Shanghai 200444, China
| | - Zhiming Li
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai Univerversity, Shanghai 200444, China
| | - Chao Fu
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai Univerversity, Shanghai 200444, China
| | - Guan Wang
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai Univerversity, Shanghai 200444, China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Xiaoyu Wu
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai Univerversity, Shanghai 200444, China
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38
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Xu J, Li X, Chen XY, He YT, Lei J, Chen ZZ, Xu ZG. Silver-Catalyzed Decarboxylative Acylation of Isocyanides Accesses to α-Ketoamides with Air as a Sole Oxidant. Molecules 2023; 28:5342. [PMID: 37513215 PMCID: PMC10383724 DOI: 10.3390/molecules28145342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/07/2023] [Accepted: 07/08/2023] [Indexed: 07/30/2023] Open
Abstract
α-Ketoamide moieties, as privileged units, may represent a valuable option to develop compounds with favorable biological activities, such as low toxicity, promising PK and drug-like properties. An efficient silver-catalyzed decarboxylative acylation of α-oxocarboxylic acids with isocyanides was developed to derivatize the α-ketoamide functional group via a multicomponent reaction (MCR) cascade sequence in one pot. A series of α-ketoamides was synthesized with three components of isocyanides, aromatic α-oxocarboxylic acid analogues and water in moderate yields. Based on the research, the silver-catalyzed decarboxylative acylation confirmed that an oxygen atom of the amide moiety was derived from the water and air as a sole oxidant for the whole process.
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Affiliation(s)
- Jia Xu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Xue Li
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Xing-Yu Chen
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Yu-Ting He
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Jie Lei
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Zhong-Zhu Chen
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Zhi-Gang Xu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
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39
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Li X, Yuan X, Hu J, Li Y, Bao H. Radical Decarboxylative Carbon-Nitrogen Bond Formation. Molecules 2023; 28:molecules28104249. [PMID: 37241989 DOI: 10.3390/molecules28104249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023] Open
Abstract
The carbon-nitrogen bond is one of the most prevalent chemical bonds in natural and artificial molecules, as many naturally existing organic molecules, pharmaceuticals, agrochemicals, and functional materials contain at least one nitrogen atom. Radical decarboxylative carbon-nitrogen bond formation from readily available carboxylic acids and their derivatives has emerged as an attractive and valuable tool in modern synthetic chemistry. The promising achievements in this research topic have been demonstrated via utilizing this strategy in the synthesis of complex natural products. In this review, we will cover carbon-nitrogen bond formation via radical decarboxylation of carboxylic acids, Barton esters, MPDOC esters, N-hydroxyphthalimide esters (NHP esters), oxime esters, aryliodine(III) dicarboxylates, and others, respectively. This review aims to bring readers a comprehensive survey of the development in this rapidly expanding field. We hope that this review will emphasize the knowledge, highlight the proposed mechanisms, and further disclose the fascinating features in modern synthetic applications.
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Affiliation(s)
- Xiangting Li
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350117, China
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
| | - Xiaobin Yuan
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350117, China
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
| | - Jiahao Hu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
- College of Chemistry, Fuzhou University, 2 Xueyuan Road, Fuzhou 350108, China
| | - Yajun Li
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350117, China
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
| | - Hongli Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
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40
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Li S, Wen YH, Song J, Gong LZ. Asymmetric redox benzylation of enals enabled by NHC/Ru cooperative catalysis. SCIENCE ADVANCES 2023; 9:eadf5606. [PMID: 37075106 PMCID: PMC10115414 DOI: 10.1126/sciadv.adf5606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The development of general methods for asymmetric benzylation of prochiral carbon nucleophiles remains a challenge in organic synthesis. The merging of ruthenium catalysis and N-heterocyclic carbene (NHC) catalysis for asymmetric redox benzylation of enals has been achieved, which opens up strategic opportunities for the asymmetric benzylation reactions. A wide range of 3,3'-disubstituted oxindoles with a stereogenic quaternary carbon center widely existing in natural products and biologically interesting molecules is successfully obtained with excellent enantioselectivities [up to 99% enantiomeric excess (ee)]. The generality of this catalytic strategy was further highlighted by its successful application in the late-stage functionalization of oxindole skeletons. Furthermore, the linear correlation between ee values of NHC precatalyst and the product elucidated the independent catalytic cycle of either the NHC catalyst or the ruthenium complex.
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Affiliation(s)
- Shuai Li
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Yu-Hua Wen
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jin Song
- Institutes of Physical Science and Information Technology, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei 230601, China
- Corresponding author. (L.-Z. G.); (J. S.)
| | - Liu-Zhu Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei 230026, China
- Corresponding author. (L.-Z. G.); (J. S.)
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Yahoum MM, Toumi S, Hentabli S, Tahraoui H, Lefnaoui S, Hadjsadok A, Amrane A, Kebir M, Moula N, Assadi AA, Zhang J, Mouni L. Experimental Analysis and Neural Network Modeling of the Rheological Behavior of Xanthan Gum and Its Derivatives. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2565. [PMID: 37048859 PMCID: PMC10095490 DOI: 10.3390/ma16072565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/11/2023] [Accepted: 03/18/2023] [Indexed: 06/19/2023]
Abstract
The main objective of this study was to create a mathematical tool that could be used with experimental data to predict the rheological flow behavior of functionalized xanthan gum according to the types of chemical groups grafted onto its backbone. Different rheological and physicochemical analyses were applied to assess six derivatives synthesized via the etherification of xanthan gum by hydrophobic benzylation with benzyl chloride and carboxymethylation with monochloroacetic acid at three (regent/polymer) ratios R equal to 2.4 and 6. Results from the FTIR study verified that xanthan gum had been modified. The degree of substitution (DS) values varying between 0.2 and 2.9 for carboxymethylxanthan gum derivatives were found to be higher than that of hydrophobically modified benzyl xanthan gum for which the DS ranged from 0.5 to 1. The molecular weights of all the derivatives were found to be less than that of xanthan gum for the two types of derivatives, decreasing further as the degree of substitution (DS) increased. However, the benzyl xanthan gum derivatives presented higher molecular weights varying between 1,373,146 (g/mol) and 1,262,227 (g/mol) than carboxymethylxanthan gum derivatives (1,326,722-1,015,544) (g/mol). A shear-thinning behavior was observed in the derivatives, and the derivatives' viscosity was found to decrease with increasing DS. The second objective of this research was to create an ANN model to predict one of the rheological properties (the apparent viscosity). The significance of the ANN model (R2 = 0.99998 and MSE = 5.95 × 10-3) was validated by comparing experimental results with the predicted ones. The results showed that the model was an efficient tool for predicting rheological flow behavior.
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Affiliation(s)
- Madiha Melha Yahoum
- Materials and Environment Laboratory (LME), University Yahia Fares of Medea, Medea 26000, Algeria
| | - Selma Toumi
- Faculty of Sciences, Nouveau Pole Urbain, University Yahia Fares of Medea, Medea 26000, Algeria
| | - Salma Hentabli
- Laboratory of Experimental Biology and Pharmacology (LBPE), University Yahia Fares of Medea, Medea 26000, Algeria
| | - Hichem Tahraoui
- Laboratoire de Génie des Procédés Chimiques, Department of Process Engineering, University of Ferhat Abbas, Setif 19000, Algeria
- Laboratory of Biomaterials and Transport Phenomena (LBMTP), University Yahia Fares of Medea, Medea 26000, Algeria
| | - Sonia Lefnaoui
- Laboratory of Experimental Biology and Pharmacology (LBPE), University Yahia Fares of Medea, Medea 26000, Algeria
| | - Abdelkader Hadjsadok
- Functional Analysis of Chemical Processes Laboratory, Chemical Engineering Department, Saad Dahlab University, PB 270, Blida 09000, Algeria
| | - Abdeltif Amrane
- Ecole Nationale Supérieure de Chimie de Rennes, Centre National de la Recherche Scientifique (CNRS), ISCR—UMR 6226, Université de Rennes, F-35000 Rennes, France
| | - Mohammed Kebir
- Research Unit on Analysis and Technological Development in Environment (URADTE-CRAPC), BP 384, Bou-Ismail 42004, Algeria
| | - Nassim Moula
- Fundamental and Applied Research in Animal and Health (FARAH), Department of Veterinary Management of Animal Resources, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium
| | - Amin Aymen Assadi
- Ecole Nationale Supérieure de Chimie de Rennes, Centre National de la Recherche Scientifique (CNRS), ISCR—UMR 6226, Université de Rennes, F-35000 Rennes, France
- College of Engineering, Imam Mohammad Ibn Saud Islamic University, IMSIU, Riyadh 11432, Saudi Arabia
| | - Jie Zhang
- School of Engineering, Merz Court, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Lotfi Mouni
- Laboratory of Management and Valorization of Natural Resources and Quality Assurance, SNVST Faculty, Akli Mohand Oulhadj University, Bouira 10000, Algeria
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42
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Li K, Zhen S, Wang W, Du J, Yu S, Wu Y, Guo H. Fungicide-inspired precursors of π-allylpalladium intermediates for palladium-catalyzed decarboxylative cycloadditions. Chem Sci 2023; 14:3024-3029. [PMID: 36937593 PMCID: PMC10016346 DOI: 10.1039/d3sc00112a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 02/19/2023] [Indexed: 02/23/2023] Open
Abstract
Inspired by a fungicide, we designed 5-vinyloxazolidine-2,4-diones as new precursors of π-allylpalladium zwitterionic intermediates and developed palladium-catalyzed asymmetric (5 + 3) cycloaddition with azomethine imines and (3 + 2) cycloaddition with 1,1-dicyanoalkenes. Both reactions proceeded smoothly under mild reaction conditions to produce various chiral heterocyclic compounds in high yields with excellent enantioselectivities. These results revealed that 5-vinyloxazolidine-2,4-diones were a type of suitable precursor for palladium catalysis and will find extensive applications in Pd-catalyzed reactions such as cycloaddition and allylic alkylation.
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Affiliation(s)
- Kuan Li
- Department of Chemistry, Innovation Center of Pesticide Research, China Agricultural University Beijing 100193 China
| | - Shuo Zhen
- Department of Chemistry, Innovation Center of Pesticide Research, China Agricultural University Beijing 100193 China
| | - Wang Wang
- Department of Chemistry, Innovation Center of Pesticide Research, China Agricultural University Beijing 100193 China
| | - Juan Du
- Department of Chemistry, Innovation Center of Pesticide Research, China Agricultural University Beijing 100193 China
| | - Songcheng Yu
- College of Public Health, Zhengzhou University Zhengzhou 450001 China
| | - Yongjun Wu
- College of Public Health, Zhengzhou University Zhengzhou 450001 China
| | - Hongchao Guo
- Department of Chemistry, Innovation Center of Pesticide Research, China Agricultural University Beijing 100193 China
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43
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Dong Y, Liu J, Gao X, Pan T, Mao B, Yu S, Wu Y, Zhang C, Guo H. Pd-catalyzed cascade cyclization of allenylethylene carbonates and indandiones: Synthesis of tetracyclic dihydrocyclopentaindenofuranone derivatives. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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44
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Gao T, Yang Y, Hu L, Luo D, Zhang X, Xiong Y. Metal -free PhI(OAc) 2-oxidized decarboxylation of propiolic acids towards synthesis of α-acetoxy ketones and insights into general decarboxylation with DFT calculations. Org Biomol Chem 2023; 21:1457-1462. [PMID: 36651659 DOI: 10.1039/d2ob02281h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A metal-free oxidative decarboxylation reaction of propiolic acids mediated by hypervalent iodine(III) reagents is described. This decarboxylative C-O bond-forming reaction used a combination of (diacetoxyiodo)benzene and aromatic, heteroaromatic or aliphatic propiolic acids to give the corresponding α-acetoxy ketones. Preliminary mechanistic studies based on both DFT calculations and high-resolution mass spectroscopy (HRMS) suggested that the reaction proceeded through decarboxylation to form a propargyl iodide intermediate. This reaction provides an attractive alternative to existing methods for the exclusive synthesis of α-acyloxy ketones.
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Affiliation(s)
- Tianyong Gao
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Yawen Yang
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Liangzhen Hu
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Dan Luo
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Xiaohui Zhang
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China.
| | - Yan Xiong
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 401331, China. .,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China.,School of Chemical and Environmental Engineering, and Collaborative Innovation Center for High Value Transformation of Coal Chemical Process By-products, Xinjiang Institute of Engineering, Xinjiang 830091, China
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45
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Bhardwaj S, Gopalakrishnan DK, Garg D, Vaitla J. Bidirectional Iterative Approach to Sequence-Defined Unsaturated Oligoesters. JACS AU 2023; 3:252-260. [PMID: 36711094 PMCID: PMC9875252 DOI: 10.1021/jacsau.2c00641] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 06/18/2023]
Abstract
Herein, we describe the development of a new strategy for the synthesis of unsaturated oligoesters via sequential metal- and reagent-free insertion of vinyl sulfoxonium ylides into the O-H bond of carboxylic acid. Like two directional coupling of amino acids (N- to C-terminal and C- to N-terminal) in peptide synthesis, the present approach offers a strategy in both directions to synthesize oligoesters. The sequential addition of the vinyl sulfoxonium ylide to the carboxylic acids (acid iteration sequence) in one direction and the sequential addition of the carboxylic acids to the vinyl sulfoxonium ylide (ylide iteration sequence) in another direction yield (Z)-configured unsaturated oligoesters. To perform this iteration, we have developed a highly regioselective insertion of vinyl sulfoxonium ylide into the X-H (X = O, N, C, S, halogen) bond of acids, thiols, phenols, amines, indoles, and halogen acids under metal-free reaction conditions. The insertion reaction is applied to a broad range of substrates (>50 examples, up to 99% yield) and eight iterative sequences. Mechanistic studies suggest that the rate-limiting step depends on the type of X-H insertion.
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46
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Yang Y, Liu S, Li S, Liu Z, Liao P, Sivaguru P, Lu Y, Gao J, Bi X. Site-Selective C-H Allylation of Alkanes: Facile Access to Allylic Quaternary sp 3 -Carbon Centers. Angew Chem Int Ed Engl 2023; 62:e202214519. [PMID: 36428220 DOI: 10.1002/anie.202214519] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/24/2022] [Accepted: 11/25/2022] [Indexed: 11/27/2022]
Abstract
The construction of allylic quaternary sp3 -carbon centers has long been a formidable challenge in transition-metal-catalyzed alkyl-allyl coupling reactions due to the severe steric hindrance. Herein, we report an effective carbene strategy that employs well-defined vinyl-N-triftosylhydrazones as a versatile allylating reagent to enable direct assembly of these medicinally desirable structural elements from low-cost alkane feedstocks. The reaction exhibited excellent site selectivity for tertiary C-H bonds, broad scope (>60 examples and >20 : 1:0 r. r.) and good efficiency, even on a gram-scale, making it a convenient alternative to the well-known Trost-Tsuji allylation reaction for the formation of alkyl-allyl bonds. Combined experimental and computational studies were employed to unravel the mechanism and origin of site- and chemoselectivity of the reaction.
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Affiliation(s)
- Yong Yang
- Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Shaopeng Liu
- Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Shuang Li
- Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Zhaohong Liu
- Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | | | | | - Ying Lu
- Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Jiaojiao Gao
- Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Xihe Bi
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 300071, Tianjin, China
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47
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Yuan Y, Yang J, Zhang J. Cu-catalyzed enantioselective decarboxylative cyanation via the synergistic merger of photocatalysis and electrochemistry. Chem Sci 2023; 14:705-710. [PMID: 36741520 PMCID: PMC9847662 DOI: 10.1039/d2sc05428k] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022] Open
Abstract
The development of an efficient and straightforward method for decarboxylative coupling using common alkyl carboxylic acid is of great value. However, decarboxylative coupling with nucleophiles always needs stoichiometric chemical oxidants or substrate prefunctionalization. Herein, we report a protocol for Cu-catalyzed enantioselective decarboxylative cyanation via the merger of photocatalysis and electrochemistry. CeCl3 and Cu/BOX were used as co-catalysts to promote the decarboxylation and cyanation, and both catalysts were regenerated via anodic oxidation. This method establishes a proof of concept enantioselective transformation via photoelectrocatalysis. Studies by DFT calculations provided mechanistic insight on enantioselectivity control.
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Affiliation(s)
- Yin Yuan
- Department of Chemistry, Fudan University2005 Songhu RoadShanghai200438P. R. China
| | - Junfeng Yang
- Department of Chemistry, Fudan University2005 Songhu RoadShanghai200438P. R. China,Fudan Zhangjiang InstituteShanghai 201203P. R. China
| | - Junliang Zhang
- Department of Chemistry, Fudan University2005 Songhu RoadShanghai200438P. R. China
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48
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Zhao Z, Liu Y, Wang S, Tang S, Ma D, Zhu Z, Guo C, Qiu Y. Site-Selective Electrochemical C-H Carboxylation of Arenes with CO 2. Angew Chem Int Ed Engl 2023; 62:e202214710. [PMID: 36382417 DOI: 10.1002/anie.202214710] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Indexed: 11/18/2022]
Abstract
Herein, a direct, metal-free, and site-selective electrochemical C-H carboxylation of arenes by reductive activation using CO2 as the economic and abundant carboxylic source was reported. The electrocarboxylation was carried out in an operationally simple manner with high chemo- and regioselectivity, setting the stage for the challenging site-selective C-H carboxylation of unactivated (hetero)arenes. The robust nature of the electrochemical strategy was reflected by a broad scope of substrates with excellent atom economy and unique selectivity. Notably, the direct and selective C-H carboxylation of various challenging arenes worked well in this approach, including electron-deficient naphthalenes, pyridines, simple phenyl derivatives, and substituted quinolines. The method benefits from being externally catalyst-free, metal-free and base-free, which makes it extremely attractive for potential applications.
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Affiliation(s)
- Zhiwei Zhao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Yin Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Siyi Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Shunyao Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Dengke Ma
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Zile Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Chengcheng Guo
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Youai Qiu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
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49
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Shimizu Y, Kanai M. Boron-Catalyzed α-Functionalizations of Carboxylic Acids. CHEM REC 2023:e202200273. [PMID: 36639245 DOI: 10.1002/tcr.202200273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/24/2022] [Indexed: 01/15/2023]
Abstract
Catalytic, chemoselective, and asymmetric α-functionalizations of carboxylic acids promise up-grading simple feedstock materials to value-added functional molecules, as well as late-stage structural diversifications of multifunctional molecules, such as drugs and their leads. In this personal account, we describe boron-catalyzed α-functionalizations of carboxylic acids developed in our group (five reaction types). The reversible boron carboxylate formation is key to the acidification of the α-protons and enolization using mild organic bases, allowing for chemoselective and asymmetric bond formations of carboxylic acids. The ligand effects on reactivity and stereoselectivity, substrate scopes, and mechanistic insights are summarized.
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Affiliation(s)
- Yohei Shimizu
- Department of Chemistry, Faculty of Sciences Hokkaido University, Kita 10 Nishi 8, 060-0810, Kita-ku, Sapporo, Hokkaido, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 10 Nishi 8, 001-0021, Kita-ku, Sapporo, Hokkaido, Japan
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
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Bao M, Lopez K, Gurung R, Arman H, Doyle MP. Stereoretentive Catalytic [3+2]-Cycloaddition/Rearrangement/Decarboxylation Reactions of Indoles with Non-Racemic Donor–Acceptor Cyclopropanes. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Ming Bao
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Karlos Lopez
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Raj Gurung
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Hadi Arman
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Michael P. Doyle
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
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