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Intelli AJ, Pal M, Selvaraju M, Altman RA. Palladium-Catalyzed Dearomatization of Benzothiophenes: Isolation and Functionalization of a Discrete Dearomatized Intermediate. SYNTHESIS-STUTTGART 2023; 55:3568-3574. [PMID: 37915377 PMCID: PMC10617892 DOI: 10.1055/a-2092-9012] [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] [Indexed: 11/03/2023]
Abstract
A Pd-catalyzed decarboxylative dearomatization reaction of a heterocyclic substrate enables access to an uncommon reaction intermediate that rearomatizes in the presence of amine bases in a net C-H functionalization sequence. The dearomatized benzo[b]thiophene intermediate bears an exocyclic alkene that can be functionalized through cycloaddition and halogenation reactions to deliver complex heterocyclic products.
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Affiliation(s)
- Andrew John Intelli
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana 47907, United States
| | - Mohan Pal
- NuChem Sciences Inc.; 2350 Rue Cohen Suite 201, Saint-Laurent, Quebec, Canada H4R 2N6
| | | | - Ryan A Altman
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana 47907, United States
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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2
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Tian Q, Yin X, Sun R, Wu X, Li Y. The lower the better: Efficient carbonylative reactions under atmospheric pressure of carbon monoxide. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3
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De S, Tomiczek BM, Yang Y, Ko K, Ghiviriga I, Roitberg A, Grenning AJ. Diastereoselective Indole-Dearomative Cope Rearrangements by Compounding Minor Driving Forces. Org Lett 2022; 24:3726-3730. [PMID: 35576941 PMCID: PMC10112279 DOI: 10.1021/acs.orglett.2c01381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reported herein is the discovery of a diastereoselective indole-dearomative Cope rearrangement. A suite of minor driving forces promote dearomatization: (i) steric congestion in the starting material, (ii) alkylidene malononitrile and stilbene conjugation events in the product, and (iii) an unexpected intramolecular π-π* stack on the product side of the equilibrium. The key substrates are rapidly assembled from simple starting materials, resulting in many successful examples. The products are structurally complex and bear vicinal stereocenters generated by the dearomative Cope rearrangement. They also contain a variety of functional groups for interconversion to complex architectures.
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Affiliation(s)
- Subhadip De
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32603, United States
| | - Breanna M Tomiczek
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32603, United States
| | - Yinuo Yang
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32603, United States
| | - Kenneth Ko
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32603, United States
| | - Ion Ghiviriga
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32603, United States
| | - Adrian Roitberg
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32603, United States
| | - Alexander J Grenning
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32603, United States
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4
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Cai L, Zhang H, Wang K, Zhao H. Pd‐Catalyzed Decarboxylative Coupling Between Allyl Carbonates and Vinyl Benzoxazinanones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lu‐Yu Cai
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
| | - Heng Zhang
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
| | - Kuo Wang
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
| | - Hong‐Wu Zhao
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
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5
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Sakai S, Kanemoto K, Fukuzawa SI. Synthesis and Evaluation of Novel Planar‐Chiral Monophosphine Ligands Bearing Ferrocene‐Triazole Backbones. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100967] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Suguru Sakai
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry JAPAN
| | - Kazuya Kanemoto
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry Kasuga1-13-27 112-8551 Bunkyo-ku JAPAN
| | - Shin-ichi Fukuzawa
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry JAPAN
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6
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Song R, Lian Z, Feng W, Guan T, Si W, Yang D, Lv J. Palladium-Catalyzed Decarboxylative O-Allylation of Phenols with γ-Methylidene-δ-valerolactones. Org Chem Front 2022. [DOI: 10.1039/d2qo00444e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Palladium-Catalyzed decarboxylative O-allylation of phenols was developed, in which a γ-methylidene-δ- valerolactone (GMDVs) was found to be an efficient and selective allylation reagent, affording the target allyl phenyl...
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Wang HY, Zhong LJ, Lv GF, Li Y, Li JH. Photocatalytic dual decarboxylative alkenylation mediated by triphenylphosphine and sodium iodide. Org Biomol Chem 2020; 18:5589-5593. [PMID: 32677630 DOI: 10.1039/d0ob01242d] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
An efficient photocatalytic dual decarboxylative alkenylation of α,β-unsaturated carboxylic acids and alkyl N-hydroxyphthalimide (NHP) esters mediated by triphenylphosphine and sodium iodide has been developed. This protocol proceeds under 456-nanometer irradiation by visible blue light in the absence of transition metals or organic dye based photoredox catalysts. The reaction is successfully applied to a wide range of redox-active esters derived from aliphatic carboxylic acids (1°, 2° and 3°) and α-amino acids, enabling transformations of diverse α,β-unsaturated carboxylic acids to α,β-alkylated styrenes with high efficiency and excellent selectivity under mild conditions.
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Affiliation(s)
- Hong-Yu Wang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.
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8
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Photoredox/palladium-cocatalyzed enantioselective alkylation of secondary benzyl carbonates with 4-alkyl-1,4-dihydropyridines. Sci China Chem 2020. [DOI: 10.1007/s11426-019-9732-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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Affiliation(s)
- Jon A. Tunge
- Department of Chemistry The University of Kansas 1567 Irving Hill Rd. Lawrence, KS 66045 USA
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10
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Kuwano R, Yokogi M, Sakai K, Masaoka S, Miura T, Won S. Room-Temperature Benzylic Alkylation of Benzylic Carbonates: Improvement of Palladium Catalyst and Mechanistic Study. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Ryoichi Kuwano
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Center for Molecular Systems (CMS), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masashi Yokogi
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Ken Sakai
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Center for Molecular Systems (CMS), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Shigeyuki Masaoka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Takashi Miura
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Sungyong Won
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
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11
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Xu JX, Wu XF. Palladium-Catalyzed Decarboxylative Carbonylative Transformation of Benzyl Aryl Carbonates: Direct Synthesis of Aryl 2-Arylacetates. Org Lett 2018; 20:5938-5941. [PMID: 30178672 DOI: 10.1021/acs.orglett.8b02631] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A procedure on palladium-catalyzed decarboxylative alkoxycarbonylation of carbonates for the synthesis of aryl 2-arylacetates has been developed. A broad range of aryl 2-arylacetates were obtained in good yields under mild conditions under a carbon monoxide atmosphere. Interestingly, other alcohols can be added as nucleophiles as well, and the corresponding esters were also obtained in good yields.
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Affiliation(s)
- Jian-Xing Xu
- Leibniz-Institut für Katalyse an der Universität Rostock e. V. , Albert-Einstein-Straße 29a , 18059 Rostock , Germany
| | - Xiao-Feng Wu
- Leibniz-Institut für Katalyse an der Universität Rostock e. V. , Albert-Einstein-Straße 29a , 18059 Rostock , Germany
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12
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Enantioselective α-Benzylation of Acyclic Esters Using π-Extended Electrophiles. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806742] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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13
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Schwarz KJ, Yang C, Fyfe JWB, Snaddon TN. Enantioselective α-Benzylation of Acyclic Esters Using π-Extended Electrophiles. Angew Chem Int Ed Engl 2018; 57:12102-12105. [PMID: 30011353 DOI: 10.1002/anie.201806742] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Indexed: 11/06/2022]
Abstract
The first asymmetric cooperative Lewis base/palladium catalyzed benzylic alkylation of acyclic esters is reported. This reaction proceeds via stereodefined C1-ammonium enolate nucleophiles. Critical to its success was the identification of benzylic phosphate electrophiles, which were uniquely reactive. Alkylated products were obtained with very high levels of enantioselectivity, and this method has been applied toward the synthesis of the thrombin inhibitor DX-9065a.
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Affiliation(s)
- Kevin J Schwarz
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - Chao Yang
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - James W B Fyfe
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - Thomas N Snaddon
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
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Kong D, Moon PJ, Qian W, Lundgren RJ. Expanding the limit of Pd-catalyzed decarboxylative benzylations. Chem Commun (Camb) 2018; 54:6835-6838. [DOI: 10.1039/c8cc02380h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The Pd-catalyzed decarboxylative benzylation of aryl bromides using a diverse range of electron-deficient aryl acetates is reported.
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Affiliation(s)
- Duanyang Kong
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
| | | | - Wenyu Qian
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
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