1
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Guo CY, Chen JZ, Liu WT, Mei H, Meng J, Chen JP. Organocatalytic enantioselective decarboxylative protonation of α-alkyl-α-aryl malonate monoesters. Chem Commun (Camb) 2024; 60:3854-3857. [PMID: 38497353 DOI: 10.1039/d3cc06018g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
In contrast to the well-established enzymatic enantioselective decarboxylative protonation (EDP), the corresponding chemocatalytic reactions of acyclic malonic acid derivatives remain challenging. Herein, we developed a biomimetic EDP of α-alkyl-α-aryl malonate monoesters using a chiral 1,2-trans-diaminocyclohexane-based N-sulfonamide as an organocatalyst. The method demonstrates excellent chemical yields, good enantioselectivity, mild reaction conditions, and the generation of only CO2 as waste.
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Affiliation(s)
- Cong-Ying Guo
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Jia-Zheng Chen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Wen-Ting Liu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Hao Mei
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Jie Meng
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Jian-Ping Chen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
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2
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Lan R, Yager B, Jee Y, Day CS, Jones AC. Ligand effects, solvent cooperation, and large kinetic solvent deuterium isotope effects in gold(I)-catalyzed intramolecular alkene hydroamination. Beilstein J Org Chem 2024; 20:479-496. [PMID: 38440168 PMCID: PMC10910400 DOI: 10.3762/bjoc.20.43] [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: 08/18/2023] [Accepted: 01/12/2024] [Indexed: 03/06/2024] Open
Abstract
Kinetic studies on the intramolecular hydroamination of protected variants of 2,2-diphenylpent-4-en-1-amine were carried out under a variety of conditions with cationic gold catalysts supported by phosphine ligands. The impact of ligand on gold, protecting group on nitrogen, and solvent and additive on reaction rates was determined. The most effective reactions utilized more Lewis basic ureas, and more electron-withdrawing phosphines. A DCM/alcohol cooperative effect was quantified, and a continuum of isotope effects was measured with low KIE's in the absence of deuterated alcoholic solvent, increasing to large solvent KIE's when comparing reactions in pure MeOH to those in pure MeOH-d4. The effects are interpreted both within the context of a classic gold π-activation/protodeauration mechanism and a general acid-catalyzed mechanism without intermediate gold alkyls.
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Affiliation(s)
- Ruichen Lan
- Chemistry, Wake Forest University, 1834 Gulley Rd., Winston-Salem, NC, 27109, USA
| | - Brock Yager
- Chemistry, Wake Forest University, 1834 Gulley Rd., Winston-Salem, NC, 27109, USA
| | - Yoonsun Jee
- Chemistry, Wake Forest University, 1834 Gulley Rd., Winston-Salem, NC, 27109, USA
| | - Cynthia S Day
- Chemistry, Wake Forest University, 1834 Gulley Rd., Winston-Salem, NC, 27109, USA
| | - Amanda C Jones
- Chemistry, Wake Forest University, 1834 Gulley Rd., Winston-Salem, NC, 27109, USA
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3
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Gutman KL, Quintanilla CD, Zhang L. Catalytic Enantioselective Protonation of Gold Enolates Enabled by Cooperative Gold(I) Catalysis. J Am Chem Soc 2024; 146:3598-3602. [PMID: 38295275 DOI: 10.1021/jacs.3c11919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Enantioselective protonation is a versatile approach to the construction of tertiary α-stereocenters, which are common structural motifs in various natural products and biologically relevant compounds. Herein we report a mild access to these chiral centers using cooperative gold(I) catalysis. From cyclic ketone enol carbonates, this asymmetric catalysis provides highly enantioselective access to cyclic ketones featuring an α tertiary chiral center, including challenging 2-methylsuberone. In combination with the gold-catalyzed formation of cyclopentadienyl carbonates in a one-pot, two-step process, this chemistry enables expedient access to synthetically versatile α'-chiral cyclopentenones with excellent enantiomeric excesses from easily accessible enynyl carbonate substrates.
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Affiliation(s)
- Kaylaa L Gutman
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Carlos D Quintanilla
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Liming Zhang
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
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4
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Jang J, Kim H, Shin S. Revised Mechanism of Gold-Catalyzed Thioallylation of Propiolates. J Org Chem 2023; 88:15437-15443. [PMID: 37851405 DOI: 10.1021/acs.joc.3c02007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
Gold-catalyzed enantioselective thioallylation of propiolates proved effective in delivering highly enantio-enriched α-allyl-β-thioacrylates. In this work, we report a revised mechanism for this process based on the new mechanistic experiments and kinetic data in the presence of a competitive inhibitor. The employment of thioethers as nucleophiles inevitably involves their competitive binding to the only catalytic site of the Au(I) catalyst, which may inhibit the activity. We developed a modified Hammett plot in the presence of a dummy thioether inhibitor, which revealed a true kinetic profile, excluding the effect of inhibition. A revised mechanism suggested that the conjugate addition of thioethers to the Au(I)-activated alkynes is the turnover-limiting step, and the subsequent [3,3]-rearrangement occurs quickly, suggesting the efficacy of the sulfonium-based approach in accelerating Claisen rearrangement. In addition, the enantioselectivity was suggested to be determined during the sigmatropic rearrangement by discriminating the prochiral olefin faces of the allyl group in the σ-bound Au(I) complex.
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Affiliation(s)
- Jiwon Jang
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Hanbyul Kim
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Seunghoon Shin
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
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5
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Huang J, Chen LL, Ding TM, Chen ZM. Iron-catalyzed hydroarylation of 1,3-dienes with indoles. Org Chem Front 2023. [DOI: 10.1039/d2qo01653b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient iron-catalyzed hydroarylation of 1,3-dienes with indoles has been developed for the first time.
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Affiliation(s)
- Jie Huang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Ling-Ling Chen
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Tong-Mei Ding
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zhi-Min Chen
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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6
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Emori W, Ogunwale GJ, Louis H, Agwamba EC, Wei K, Unimuke TO, Cheng CR, Ejiofor EU, Asogwa FC, Adeyinka AS. Spectroscopic (UV–vis, FT-IR, FT-Raman, and NMR) analysis, structural benchmarking, molecular properties, and the in-silico cerebral anti-ischemic activity of 2-amino-6-ethoxybenzothiazole. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133318] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Lin B, Yang T, Zhang D, Zhou Y, Wu L, Qiu J, Chen G, Che C, Zhang X. Gold‐Catalyzed Desymmetric Lactonization of Alkynylmalonic Acids Enabled by Chiral Bifunctional P,N ligands. Angew Chem Int Ed Engl 2022; 61:e202201739. [DOI: 10.1002/anie.202201739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Bijin Lin
- Department of Chemistry the Grubbs Institute Medi-X Pingshan Southern University of Science and Technology Shenzhen 518055 China
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong China
| | - Tilong Yang
- Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong China
| | - Dequan Zhang
- Department of Chemistry the Grubbs Institute Medi-X Pingshan Southern University of Science and Technology Shenzhen 518055 China
| | - Yang Zhou
- Department of Chemistry the Grubbs Institute Medi-X Pingshan Southern University of Science and Technology Shenzhen 518055 China
| | - Liangliang Wu
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong China
| | - Jingfei Qiu
- Department of Chemistry the Grubbs Institute Medi-X Pingshan Southern University of Science and Technology Shenzhen 518055 China
| | - Gen‐Qiang Chen
- Department of Chemistry the Grubbs Institute Medi-X Pingshan Southern University of Science and Technology Shenzhen 518055 China
- Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518055 China
| | - Chi‐Ming Che
- Department of Chemistry the Grubbs Institute Medi-X Pingshan Southern University of Science and Technology Shenzhen 518055 China
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong China
| | - Xumu Zhang
- Department of Chemistry the Grubbs Institute Medi-X Pingshan Southern University of Science and Technology Shenzhen 518055 China
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8
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Bay AV, Farnam EJ, Scheidt KA. Synthesis of Cyclohexanones by a Tandem Photocatalyzed Annulation. J Am Chem Soc 2022; 144:7030-7037. [PMID: 35316053 PMCID: PMC9050940 DOI: 10.1021/jacs.1c13105] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The rapid synthesis of cyclic scaffolds is of high importance to the chemistry community. Strategies for the convergent synthesis of substituted carbocycles and heterocycles remain underexplored despite the plethora of applications that these cyclic motifs have in the pharmaceutical and materials industries. Reported herein is a tandem carbene and photoredox-catalyzed process for the convergent synthesis of substituted cycloalkanones via a formal [5 + 1] cycloaddition. Featuring two distinct photoredox cycles and a novel α-oxidation of benzylic ketones, this reaction offers a mild approach to construct two contiguous C-C bonds and eliminates the need for strong bases or expensive metal catalysts. The utility of this method is highlighted through various product diversification reactions that allow access to a range of important cyclic scaffolds.
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Affiliation(s)
- Anna V Bay
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Emelia J Farnam
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Karl A Scheidt
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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9
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Lin B, Yang T, Zhang D, Zhou Y, Wu L, Qiu J, Chen GQ, Che CM, Zhang X. Gold‐Catalyzed Desymmetric Lactonization of Alkynylmalonic Acids Enabled by Chiral Bifunctional P,N ligands. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Bijin Lin
- Southern University of Science and Technology Department of Chemistry 518000 Shenzhen CHINA
| | - Tilong Yang
- Hong Kong University of Science and Technology School of Science Department of Chemistry Hongkong CHINA
| | - Dequan Zhang
- Southern University of Science and Technology Department of Chemistry CHINA
| | - Yang Zhou
- Southern University of Science and Technology Department of Chemistry CHINA
| | - Liangliang Wu
- Hong Kong University: University of Hong Kong Department of Chemistry CHINA
| | - Jingfei Qiu
- Southern University of Science and Technology Department of Chemistry CHINA
| | - Gen-Qiang Chen
- Southern University of Science and Technology Department of Chemistry CHINA
| | - Chi-Ming Che
- The University of Hong Kong Department of Chemistry CHINA
| | - Xumu Zhang
- Southern University of Science and Technology Chemistry 1088 Xueyuan Avenue 518055 Shenzhen CHINA
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10
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Mikhailov IE, Dushenko GA, Minkin VI. Pentacarboxycyclopentadienes in Organic Synthesis. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428021110014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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He F, Shen G, Yang X. Asymmetric Aminations and Kinetic Resolution of Acyclic
α‐Branched
Ynones. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100514] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Faqian He
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
- University of Chinese Academy of Sciences Beijing 100049 China
- Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China
| | - Guosong Shen
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Xiaoyu Yang
- School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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12
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Zhang C, Gao AZ, Nie X, Ye CX, Ivlev SI, Chen S, Meggers E. Catalytic α-Deracemization of Ketones Enabled by Photoredox Deprotonation and Enantioselective Protonation. J Am Chem Soc 2021; 143:13393-13400. [PMID: 34392683 DOI: 10.1021/jacs.1c06637] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This study reports the catalytic deracemization of ketones bearing stereocenters in the α-position in a single reaction via deprotonation, followed by enantioselective protonation. The principle of microscopic reversibility, which has previously rendered this strategy elusive, is overcome by a photoredox deprotonation through single electron transfer and subsequent hydrogen atom transfer (HAT). Specifically, the irradiation of racemic pyridylketones in the presence of a single photocatalyst and a tertiary amine provides nonracemic carbonyl compounds with up to 97% enantiomeric excess. The photocatalyst harvests the visible light, induces the redox process, and is responsible for the asymmetric induction, while the amine serves as a single electron donor, HAT reagent, and proton source. This conceptually simple light-driven strategy of coupling a photoredox deprotonation with a stereocontrolled protonation, in conjunction with an enrichment process, serves as a blueprint for other deracemizations of ubiquitous carbonyl compounds.
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Affiliation(s)
- Chenhao Zhang
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Anthony Z Gao
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Xin Nie
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Chen-Xi Ye
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Sergei I Ivlev
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Shuming Chen
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
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13
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Cao J, Zhu SF. Catalytic Enantioselective Proton Transfer Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200350] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jin Cao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Shou-Fei Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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14
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Escudero-Casao M, Licini G, Orlandi M. Enantioselective α-Arylation of Ketones via a Novel Cu(I)-Bis(phosphine) Dioxide Catalytic System. J Am Chem Soc 2021; 143:3289-3294. [PMID: 33635068 PMCID: PMC8041290 DOI: 10.1021/jacs.0c13236] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Indexed: 12/15/2022]
Abstract
A novel catalytic system based on copper(I) and chiral bis(phosphine) dioxides is described. This allows the arylation of silyl enol ethers to access enolizable α-arylated ketones in good yields and enantiomeric excess up to 95%. Noncyclic ketones are amenable substrates with this method, which complements other approaches based on palladium catalysis. Optimization of the ligand structure is accomplished via rational design driven by correlation analysis. Preliminary mechanistic hypotheses are also evaluated in order to identify the role of chiral bis(phosphine) dioxides.
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Affiliation(s)
| | - Giulia Licini
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
- CIRCC−Consorzio Interuniversitario
per le Reattività Chimiche e la Catalisi, University of Padova, via Marzolo 1, 35131 Padova, Italy
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15
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Long Q, Gao J, Yan N, Wang P, Li M. (C 6F 5) 3B·(HF) n-catalyzed glycosylation of disarmed glycosyl fluorides and reverse glycosyl fluorides. Org Chem Front 2021. [DOI: 10.1039/d1qo00211b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
(C6F5)3B·(HF)n-catalyzed glycosylation of disarmed glycosyl fluorides and reverse glycosyl fluorides with structurally diverse nucleophiles has been achieved.
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Affiliation(s)
- Qing Long
- Key Laboratory of Marine Medicine
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Jingru Gao
- Key Laboratory of Marine Medicine
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Ningjie Yan
- Key Laboratory of Marine Medicine
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Peng Wang
- Key Laboratory of Marine Medicine
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Ming Li
- Key Laboratory of Marine Medicine
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
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16
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Abstract
This review summarizes the recent achievements of dinuclear gold-catalyzed redox coupling, asymmetric catalysis and photocatalysis. The dinuclear gold catalysts show a better catalytic performance than the mononuclear gold catalysts in certain cases.
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Affiliation(s)
- Wenliang Wang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Cheng-Long Ji
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Kai Liu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Chuan-Gang Zhao
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Weipeng Li
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Chemistry and Biomedicine Innovation Center (ChemBIC)
- School of Chemistry and Chemical Engineering
- Nanjing University
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17
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Zhou H, Bae HY, Leutzsch M, Kennemur JL, Bécart D, List B. The Silicon-Hydrogen Exchange Reaction: A Catalytic σ-Bond Metathesis Approach to the Enantioselective Synthesis of Enol Silanes. J Am Chem Soc 2020; 142:13695-13700. [PMID: 32786813 PMCID: PMC7426905 DOI: 10.1021/jacs.0c06677] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The use of chiral enol silanes in fundamental transformations such as Mukaiyama aldol, Michael, and Mannich reactions as well as Saegusa-Ito dehydrogenations has enabled the chemical synthesis of enantiopure natural products and valuable pharmaceuticals. However, accessing these intermediates in high enantiopurity has generally required the use of either stoichiometric chiral precursors or stoichiometric chiral reagents. We now describe a catalytic approach in which strongly acidic and confined imidodiphosphorimidates (IDPi) catalyze highly enantioselective interconversions of ketones and enol silanes. These "silicon-hydrogen exchange reactions" enable access to enantiopure enol silanes via tautomerizing σ-bond metatheses, either in a deprotosilylative desymmetrization of ketones with allyl silanes as the silicon source or in a protodesilylative kinetic resolution of racemic enol silanes with a carboxylic acid as the silyl acceptor.
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Affiliation(s)
- Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany.,Department of Chemistry, Sungkyunkwan University, 16419, Suwon, Korea
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Jennifer L Kennemur
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Diane Bécart
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
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18
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Liu J, Vasamsetty L, Anwar M, Yang S, Xu W, Liu J, Nagaraju S, Fang X. Organocatalyzed Kinetic Resolution of α-Functionalized Ketones: The Malonate Unit Leads the Way. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05608] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Jian Liu
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Laxmaiah Vasamsetty
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Muhammad Anwar
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Shuang Yang
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Shanghai 200032, China
| | - Weici Xu
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Jinggong Liu
- Orthopedics Department, Guangdong Provincial Hospital of Traditional Chinese Medicine, No. 111 Dade Road, Guangzhou 510120, China
| | - Sakkani Nagaraju
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Xinqiang Fang
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Shanghai 200032, China
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19
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Purgett TJ, Dyer MW, Bickel B, McNeely J, Porco JA. Gold(I)-Mediated Cycloisomerization/Cycloaddition Enables Bioinspired Syntheses of Neonectrolides B-E and Analogues. J Am Chem Soc 2019; 141:15135-15144. [PMID: 31469554 DOI: 10.1021/jacs.9b06355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Development of a synthetic route to the oxaphenalenone (OP) natural products neonectrolides B-E is described. The synthesis relies on gold-catalyzed 6-endo-dig hydroarylation of an unusual enynol substrate as well as a one-pot Rieche formylation/cyclization/deprotection sequence to efficiently construct the tricyclic oxaphenalenone framework in the form of a masked ortho-quinone methide (o-QM). A tandem cycloisomerization/[4 + 2] cycloaddition strategy was employed to quickly construct molecules resembling the neonectrolides. The tricyclic OP natural product SF226 could be converted to corymbiferan lactone E and a related masked o-QM. Our study culminates with the application of the tandem reaction sequence to syntheses of neonectrolides B-E as well as previously unreported exo-diastereomers.
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Affiliation(s)
- Thomas J Purgett
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - Matthew W Dyer
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - Bryce Bickel
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - James McNeely
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
| | - John A Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD) , Boston University , 590 Commonwealth Avenue , Boston , Massachusetts 02215 , United States
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20
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21
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Mandrelli F, Blond A, James T, Kim H, List B. Deracemizing α‐Branched Carboxylic Acids by Catalytic Asymmetric Protonation of Bis‐Silyl Ketene Acetals with Water or Methanol. Angew Chem Int Ed Engl 2019; 58:11479-11482. [DOI: 10.1002/anie.201905623] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Francesca Mandrelli
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Aurélie Blond
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Thomas James
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Hyejin Kim
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
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22
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Hou M, Lin L, Chai X, Zhao X, Qiao B, Jiang Z. Enantioselective photoredox dehalogenative protonation. Chem Sci 2019; 10:6629-6634. [PMID: 31367315 PMCID: PMC6625487 DOI: 10.1039/c9sc02000d] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 05/29/2019] [Indexed: 12/13/2022] Open
Abstract
We report an enantioselective photoredox dehalogenative protonation as a new type of asymmetric protonation. As a paradigm, with a cooperative catalytic system consisting of a chiral H-bonding catalyst and a dicyanopyrazine-derived chromophore (DPZ) photosensitizer that is irradiated with visible light, a range of cyclic and acyclic ketones with labile chiral secondary C-F, C-Cl and C-Br bonds at the α-position were obtained in high yields with good to excellent enantioselectivities (up to >99% ee) by using a secondary amine as the terminal reductant. Given the ready accessibility of halides, the success of this work should provide inspiration for constructing diverse chiral α-tertiary carbonyls and their variants.
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Affiliation(s)
- Meimei Hou
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Lu Lin
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Xiangpei Chai
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Xiaowei Zhao
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Baokun Qiao
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
| | - Zhiyong Jiang
- Henan University , Jinming Campus , Kaifeng , Henan 475004 , China . ;
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , China
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23
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Mandrelli F, Blond A, James T, Kim H, List B. Deracemisierung von α‐verzweigten Carbonsäuren durch katalytische asymmetrische Protonierung von Bis‐Silylketenacetalen mit Wasser oder Methanol. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Francesca Mandrelli
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Aurélie Blond
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Thomas James
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Hyejin Kim
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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24
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Mohanta N, Chaudhari MB, Digrawal NK, Gnanaprakasam B. Rapid and Multigram Synthesis of Vinylogous Esters under Continuous Flow: An Access to Transetherification and Reverse Reaction of Vinylogous Esters. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nirmala Mohanta
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Moreshwar B. Chaudhari
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Naveen Kumar Digrawal
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Boopathy Gnanaprakasam
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
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25
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Traceless Solid-Phase Synthesis of Ketones via Acid-Labile Enol Ethers: Application in the Synthesis of Natural Products and Derivatives. Molecules 2019; 24:molecules24071406. [PMID: 30974778 PMCID: PMC6479686 DOI: 10.3390/molecules24071406] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/04/2019] [Accepted: 04/08/2019] [Indexed: 11/17/2022] Open
Abstract
In solid-phase organic synthesis, Wang resin is traditionally used for the immobilization of acids, alcohols, phenols, and amines. We report the use of Wang resin for the traceless synthesis of ketones via acid-labile enol ethers. We demonstrate the practicality of this synthetic strategy on the solid-phase synthesis of pyrrolidine-2,4-diones, which represent the core structure of several natural products, including tetramic acid. Base-triggered condensation of pyrrolidine-2,4-diones yielded 4-hydroxy-1,1',2',5-tetrahydro-2H,5'H-[3,3'-bipyrrole]-2,5'-diones.
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26
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Wang G, Gao L, Chen H, Liu X, Cao J, Chen S, Cheng X, Li S. Chemoselective Borane‐Catalyzed Hydroarylation of 1,3‐Dienes with Phenols. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811729] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Guoqiang Wang
- Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Liuzhou Gao
- Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Hui Chen
- Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Xueting Liu
- Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Jia Cao
- Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Shengda Chen
- School of Minerals Processing and BioengineeringCentral South University Changsha 410083 Hunan China
| | - Xu Cheng
- Institute of Chemistry and Biomedical SciencesSchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
| | - Shuhua Li
- Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Nanjing 210093 China
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27
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Wang G, Gao L, Chen H, Liu X, Cao J, Chen S, Cheng X, Li S. Chemoselective Borane-Catalyzed Hydroarylation of 1,3-Dienes with Phenols. Angew Chem Int Ed Engl 2019; 58:1694-1699. [PMID: 30515921 DOI: 10.1002/anie.201811729] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Indexed: 12/18/2022]
Abstract
A B(C6 F5 )3 -catalyzed hydroarylation of a series of 1,3-dienes with various phenols has been established through a combination of theoretical and experimental investigations, affording structurally diverse ortho-allyl phenols. DFT calculations show that the reaction proceeds through a borane-promoted protonation/Friedel-Crafts pathway involving a π-complex of a carbocation-anion contact ion pair. This protocol features simple and mild reaction conditions, broad functional-group tolerance, and low catalyst loading. The obtained ortho-allyl phenols could be further converted into flavan derivatives using B(C6 F5 )3 with good cis diastereoselectivity. Furthermore, this transformation was applied in the late-stage modification of pharmaceutical compounds.
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Affiliation(s)
- Guoqiang Wang
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Liuzhou Gao
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Hui Chen
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Xueting Liu
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Jia Cao
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Shengda Chen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
| | - Xu Cheng
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Shuhua Li
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
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28
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A highly selective Bi(OTf)3 mediated fragmentation-contraction of δ-ortholactones. A facile route to functionalized γ-lactones. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Jeedimalla N, Jacquet C, Bahneva D, Youte Tendoung JJ, Roche SP. Synthesis of α-Arylated Cycloalkanones from Congested Trisubstituted Spiro-epoxides: Application of the House–Meinwald Rearrangement for Ring Expansion. J Org Chem 2018; 83:12357-12373. [DOI: 10.1021/acs.joc.8b01448] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nagalakshmi Jeedimalla
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
| | - Camille Jacquet
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
| | - Diana Bahneva
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
| | - Jean-Jacques Youte Tendoung
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
| | - Stéphane P. Roche
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, United States
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30
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Abstract
Interest in homogeneous gold catalysis has undergone a marked increase. As strong yet air- and moisture-tolerant π-acids, cationic gold(i) complexes have been shown to catalyze diverse transformations of alkenes, alkynes and allenes, opening new opportunities for chemical synthesis. The development of efficient asymmetric variants is required in order to take full advantage of the preparative potential of these transformations. During the last few years, the chemical community has achieved tremendous success in the area. This review highlights the updated progress (2011-2015) in enantioselective gold catalysis. The discussion is classified according to the π-bonds activated by gold(i), in an order of alkynes, allenes and alkenes. Other gold activation modes, such as σ-Lewis acid catalyzed reactions and transformations of diazo compounds are also discussed.
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Affiliation(s)
- Weiwei Zi
- Department of Chemistry, University of California, Berkeley, CA 94720, USA.
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, CA 94720, USA.
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31
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Takeda N, Furuishi M, Nishijima Y, Futaki E, Ueda M, Shinada T, Miyata O. Chiral isoxazolidine-mediated stereoselective umpolung α-phenylation of methyl ketones. Org Biomol Chem 2018; 16:8940-8943. [DOI: 10.1039/c8ob02480d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Asymmetric nucleophilic phenylation of N-alkoxyenamine with triphenylaluminium is achieved for the formation of enantioenriched α-phenyl ketones through a one-pot process.
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Affiliation(s)
| | | | | | - Erika Futaki
- Kobe Pharmaceutical University
- Kobe 658-8558
- Japan
| | | | - Tetsuro Shinada
- Graduate School of Science
- Osaka City University
- Osaka 558-8585
- Japan
| | - Okiko Miyata
- Kobe Pharmaceutical University
- Kobe 658-8558
- Japan
- Graduate School of Science
- Osaka City University
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32
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Zhou Y, Bandar JS, Buchwald SL. Enantioselective CuH-Catalyzed Hydroacylation Employing Unsaturated Carboxylic Acids as Aldehyde Surrogates. J Am Chem Soc 2017; 139:8126-8129. [PMID: 28565905 PMCID: PMC5587210 DOI: 10.1021/jacs.7b04937] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The direct asymmetric copper hydride (CuH)-catalyzed coupling of α,β-unsaturated carboxylic acids to aryl alkenes to access chiral α-aryl dialkyl ketones is reported. A variety of substrate substitution patterns, sensitive functional groups, and heterocycles are tolerated in this reaction, which significantly expands the range of accessible products compared with existing hydroacylation methodology. Although mechanistic studies are ongoing, we propose that CuH-catalyzed silylation of unsaturated acids occurs to access a uniquely effective acyl electrophilic coupling partner.
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Affiliation(s)
- Yujing Zhou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Jeffrey S. Bandar
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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33
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Paladhi S, Liu Y, Kumar BS, Jung MJ, Park SY, Yan H, Song CE. Fluoride Anions in Self-Assembled Chiral Cage for the Enantioselective Protonation of Silyl Enol Ethers. Org Lett 2017; 19:3279-3282. [DOI: 10.1021/acs.orglett.7b01429] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sushovan Paladhi
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Yidong Liu
- Innovative
Drug Research Centre, Chongqing University, Chongqing 401331, China
| | - B. Senthil Kumar
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Min-Jung Jung
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Sang Yeon Park
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Hailong Yan
- Innovative
Drug Research Centre, Chongqing University, Chongqing 401331, China
| | - Choong Eui Song
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
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34
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Kingston C, Guiry PJ. Enantiodivergent Synthesis of Tertiary α-Aryl 1-Indanones: Evidence Toward Disparate Mechanisms in the Palladium-Catalyzed Decarboxylative Asymmetric Protonation. J Org Chem 2017; 82:3806-3819. [DOI: 10.1021/acs.joc.7b00303] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cian Kingston
- Synthesis and Solid State
Pharmaceutical Centre, Centre for Synthesis and Chemical Biology,
School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- Synthesis and Solid State
Pharmaceutical Centre, Centre for Synthesis and Chemical Biology,
School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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35
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Kim N, Brooner REM, Widenhoefer RA. Unexpected Skeletal Rearrangement in the Gold(I)/Silver(I)-Catalyzed Conversion of 7-Aryl-1,6-enynes to Bicyclo[3.2.0]hept-6-enes via Hidden Brønsted Acid Catalysis. Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00868] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nana Kim
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708, United States
| | - Rachel E. M. Brooner
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708, United States
| | - Ross A. Widenhoefer
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708, United States
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36
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Abstract
A synthetic route to derive the skeleton of naphthalenes starting with isovanillin is described with modest total yields via the key transformation of metal triflate-mediated intramolecular benzannulation of o-formyl or o-benzoyl allylbenzenes in MeNO2 at rt.
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Affiliation(s)
- Chieh-Kai Chan
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University Hospital
- Kaohsiung Medical University
- Kaohsiung 80708
- Taiwan
| | - Heui-Sin Wang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University Hospital
- Kaohsiung Medical University
- Kaohsiung 80708
- Taiwan
| | - Yu-Lin Tsai
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University Hospital
- Kaohsiung Medical University
- Kaohsiung 80708
- Taiwan
| | - Meng-Yang Chang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University Hospital
- Kaohsiung Medical University
- Kaohsiung 80708
- Taiwan
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37
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Zhao N, Xie S, Chen G, Xu J. Concise Synthesis of Astellatol Core Skeleton. Chemistry 2016; 22:12634-6. [DOI: 10.1002/chem.201602711] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Nan Zhao
- South University of Science and Technology of China; Department of Chemistry; No. 1088 Xueyuan Ave., Nanshan District Shenzhen Guangdong 518055 China
| | - Shengling Xie
- South University of Science and Technology of China; Department of Chemistry; No. 1088 Xueyuan Ave., Nanshan District Shenzhen Guangdong 518055 China
| | - Gui Chen
- South University of Science and Technology of China; Department of Chemistry; No. 1088 Xueyuan Ave., Nanshan District Shenzhen Guangdong 518055 China
| | - Jing Xu
- South University of Science and Technology of China; Department of Chemistry; No. 1088 Xueyuan Ave., Nanshan District Shenzhen Guangdong 518055 China
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38
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Zhu Y, Zhang L, Luo S. Asymmetric Retro-Claisen Reaction by Chiral Primary Amine Catalysis. J Am Chem Soc 2016; 138:3978-81. [DOI: 10.1021/jacs.6b00627] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yunbo Zhu
- Beijing
National Laboratory for Molecule Sciences (BNLMS), CAS Key Laboratory
for Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Long Zhang
- Beijing
National Laboratory for Molecule Sciences (BNLMS), CAS Key Laboratory
for Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Sanzhong Luo
- Beijing
National Laboratory for Molecule Sciences (BNLMS), CAS Key Laboratory
for Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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39
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Brown M, Kumar R, Rehbein J, Wirth T. Enantioselective Oxidative Rearrangements with Chiral Hypervalent Iodine Reagents. Chemistry 2016; 22:4030-5. [PMID: 26800241 PMCID: PMC4797713 DOI: 10.1002/chem.201504844] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Indexed: 11/22/2022]
Abstract
A stereoselective hypervalent iodine‐promoted oxidative rearrangement of 1,1‐disubstituted alkenes has been developed. This practically simple protocol provides access to enantioenriched α‐arylated ketones without the use of transition metals from readily accessible alkenes.
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Affiliation(s)
- Michael Brown
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK
| | - Ravi Kumar
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK
| | - Julia Rehbein
- Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany
| | - Thomas Wirth
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK.
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40
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Ondet P, Lempenauer L, Duñach E, Lemière G. Bismuth(iii) triflate-catalysed tandem cyclisations towards complex polycyclic ethers. Org Chem Front 2016. [DOI: 10.1039/c6qo00212a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of complex polycyclic ethers have been synthesised under very mild conditions using a low catalyst loading of bismuth(iii) triflate.
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Affiliation(s)
- Pierrick Ondet
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - Luisa Lempenauer
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - Elisabet Duñach
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
| | - Gilles Lemière
- Institut de Chimie de Nice
- UMR 7272
- Université Nice Sophia Antipolis
- CNRS
- 06108 Nice Cedex 2
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41
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Basceken S, Kaya S, Balci M. Intramolecular Gold-Catalyzed and NaH-Supported Cyclization Reactions of N-Propargyl Indole Derivatives with Pyrazole and Pyrrole Rings: Synthesis of Pyrazolodiazepinoindole, Pyrazolopyrazinoindole, and Pyrrolopyrazinoindole. J Org Chem 2015; 80:12552-61. [DOI: 10.1021/acs.joc.5b02419] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sinan Basceken
- Department
of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
- Department
of Chemistry, Hitit University, 19030 Corum, Turkey
| | - Serdal Kaya
- Department
of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
- Department
of Chemistry, Giresun University, 28200 Giresun, Turkey
| | - Metin Balci
- Department
of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
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42
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Gold catalysis: Experimental mechanistic insights into the anellation of phenols with 1,3-dienes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.05.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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43
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Kang BC, Nam DG, Hwang GS, Ryu DH. Catalytic Asymmetric Formal Insertion of Aryldiazoalkanes into the C–H Bond of Aldehydes: Synthesis of Enantioenriched Acyclic α-Tertiary Aryl Ketones. Org Lett 2015; 17:4810-3. [DOI: 10.1021/acs.orglett.5b02370] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Byung Chul Kang
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Dong Guk Nam
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Geum-Sook Hwang
- Western
Seoul Center, Korea Basic Science Institute, Seoul 120-140, Korea
| | - Do Hyun Ryu
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
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44
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Baillie RA, Lefèvre GP, Wakeham RJ, Holmes AS, Legzdins P. Unsymmetrical Saturated Ketones Resulting from Activations of Hydrocarbon C(sp3)–H and C(sp2)–H Bonds Effected by Cp*W(NO)(H)(η3-allyl) Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00537] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rhett A. Baillie
- Department
of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Guillaume P. Lefèvre
- Department
of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Russell J. Wakeham
- Department
of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Aaron S. Holmes
- Department
of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department
of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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45
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Chen CH, Wang CD, Hsieh YF, Liu RS. Gold-catalyzed carboalkoxylations of 2-ethynylbenzyl ethers to form 1- and 3-substituted 2-methoxy-1-H-indenes: Brønsted acids versus gold catalysis. Org Biomol Chem 2015; 12:9831-6. [PMID: 25354536 DOI: 10.1039/c4ob01794c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective synthesis of 1- and 3-substituted 2-methoxyindenes from the carboalkoxylations of 2-ethynylbenzyl ethers is described; the former is obtained efficiently with P(t-Bu)2(o-biphenyl)AuCl/NaBARF in DCM/MS 4 Å whereas the latter is produced preferably with P(t-Bu)2(o-biphenyl)AuCl/AgNTf2 in pre-dried DCM. Both 1- and 3-substituted 2-indenyl ethers are subjected to ozone oxidations to afford two distinct carbonyl products. Our new data indicate that 1-substituted 2-indenyl ethers are generated from gold catalysts whereas their 3-substituted analogues arise from Brønsted acids.
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Affiliation(s)
- Chun-Hao Chen
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, Republic of China.
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46
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Basceken S, Balci M. Design of pyrazolo-pyrrolo-pyrazines and pyrazolo-pyrrolo-diazepines via AuCl₃-catalyzed and NaH-supported cyclization of N-propargyl pyrazoles. J Org Chem 2015; 80:3806-14. [PMID: 25790184 DOI: 10.1021/acs.joc.5b00034] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A concise synthetic methodology for new heterocyclic scaffolds, such as pyrazolo-pyrrolo-pyrazine and pyrazolo-pyrrolo-diazepine skeletons, was developed. The key features of this method include (i) synthesis of pyrrole-derived α,β-alkynyl ketones, (ii) introduction of various substituents into the alkyne functionality by Sonogashira cross-coupling, (iii) synthesis of pyrazole units by the reaction of α,β-alkynyl compounds with hydrazine monohydrate, (iv) gold-catalyzed cyclization of pyrazoles with alkyne units, and (v) cyclization with NaH. Furthermore, this methodology allows various substituents to be introduced into all positions of the target compounds.
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Affiliation(s)
- Sinan Basceken
- †Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey.,‡Department of Chemistry, Hitit University, 19030 Corum, Turkey
| | - Metin Balci
- †Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey
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47
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Dynamic control of chirality in phosphine ligands for enantioselective catalysis. Nat Commun 2015; 6:6652. [PMID: 25806856 PMCID: PMC4389239 DOI: 10.1038/ncomms7652] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 02/16/2015] [Indexed: 01/15/2023] Open
Abstract
Chirality plays a fundamental role in biology and chemistry and the precise control of chirality in a catalytic conversion is a key to modern synthesis most prominently seen in the production of pharmaceuticals. In enantioselective metal-based catalysis, access to each product enantiomer is commonly achieved through ligand design with chiral bisphosphines being widely applied as privileged ligands. Switchable phosphine ligands, in which chirality is modulated through an external trigger signal, might offer attractive possibilities to change enantioselectivity in a catalytic process in a non-invasive manner avoiding renewed ligand synthesis. Here we demonstrate that a photoswitchable chiral bisphosphine based on a unidirectional light-driven molecular motor, can be used to invert the stereoselectivity of a palladium-catalysed asymmetric transformation. It is shown that light-induced changes in geometry and helicity of the switchable ligand enable excellent selectivity towards the racemic or individual enantiomers of the product in a Pd-catalysed desymmetrization reaction.
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48
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Robertson BD, Brooner REM, Widenhoefer RA. Tandem Gold/Silver-Catalyzed Cycloaddition/Hydroarylation of 7-Aryl-1,6-enynes to Form 6,6-Diarylbicyclo[3.2.0]heptanes. Chemistry 2015; 21:5714-7. [DOI: 10.1002/chem.201500371] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Indexed: 02/05/2023]
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49
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Hasegawa E, Arai S, Tayama E, Iwamoto H. Metal-free, one-pot, sequential protocol for transforming α,β-epoxy ketones to β-hydroxy ketones and α-methylene ketones. J Org Chem 2015; 80:1593-600. [PMID: 25562397 DOI: 10.1021/jo5025249] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A new sequential, one-pot protocol for transforming 1,3-disubstituted 2,3-epoxy ketones to β-hydroxy ketones and α-methylene ketones has been developed. Reaction of epoxy ketones with boron trifluoride etherate (BF3·OEt2) generates the cationic intermediates by regioselective epoxide ring opening and an acyl shift. Then, a treatment of these cations with 2-aryl-1,3-dimethylbenzimidazolines (DMBIH) results in formation of 1,2-disubstituted 3-hydroxy ketones. DMBIH serves as a hydride donor in the second step of this process. Finally, the β-hydroxy ketones can be converted to 1,2-disubstituted 2-methylene ketones by treatment with methanesulfonic acid or a combination of methanesulfonyl chloride and triethylamine. Importantly, the sequential steps involved in formation of the α-methylene ketone products can be carried out in one pot.
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Affiliation(s)
- Eietsu Hasegawa
- Department of Chemistry, Faculty of Science, Niigata University , Ikarashi-2 8050, Niigata 950-2181, Japan
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50
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Ondet P, Joffrin A, Diaf I, Lemière G, Duñach E. Cycloisomerization of Allene–Enol Ethers under Bi(OTf)3 Catalysis. Org Lett 2015; 17:1002-5. [DOI: 10.1021/acs.orglett.5b00110] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pierrick Ondet
- Institut de Chimie
de Nice,
UMR 7272, Université Nice Sophia Antipolis, CNRS, Parc
Valrose, 06108 Nice
Cedex 2, France
| | - Amélie Joffrin
- Institut de Chimie
de Nice,
UMR 7272, Université Nice Sophia Antipolis, CNRS, Parc
Valrose, 06108 Nice
Cedex 2, France
| | - Ilhem Diaf
- Institut de Chimie
de Nice,
UMR 7272, Université Nice Sophia Antipolis, CNRS, Parc
Valrose, 06108 Nice
Cedex 2, France
| | - Gilles Lemière
- Institut de Chimie
de Nice,
UMR 7272, Université Nice Sophia Antipolis, CNRS, Parc
Valrose, 06108 Nice
Cedex 2, France
| | - Elisabet Duñach
- Institut de Chimie
de Nice,
UMR 7272, Université Nice Sophia Antipolis, CNRS, Parc
Valrose, 06108 Nice
Cedex 2, France
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