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Hardee D, Huh CW, Aubé J. Synthesis of Cyclic β-Amino Acid Derivatives by Desymmetrization and Lossen Rearrangement of N-Sulfoxy Meso-Succinimides. J Org Chem 2024; 89:9420-9426. [PMID: 38965937 DOI: 10.1021/acs.joc.4c00701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
Bifunctional thiourea-based organocatalysts facilitate an enantioselective desymmetrization and Lossen rearrangement cascade reaction of N-sulfoxy meso-succinimides, resulting in the synthesis of cyclic β-amino acid derivatives. This catalytic system was optimized for bicyclic and tricyclic succinimide substrates affording yields from 61-91% and up to 96:4 er. This reaction proceeds via the group selective addition of the primary alcohol nucleophile to an enantiotopic carbonyl group with sequential rearrangement of the intermediate O-sulfonyl hydroxamate ester.
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Affiliation(s)
- Dylan Hardee
- Department of Chemistry, UNC College of Arts and Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Chan Woo Huh
- The University of Kansas Chemical Methodologies and Library Development Center, 2034 Becker Dr., Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
| | - Jeffrey Aubé
- Department of Chemistry, UNC College of Arts and Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
- The University of Kansas Chemical Methodologies and Library Development Center, 2034 Becker Dr., Delbert M. Shankel Structural Biology Center, Lawrence, Kansas 66047, United States
- Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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2
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Asano K, Matsubara S. Organocatalytic Access to Tetrasubstituted Chiral Carbons Integrating Functional Groups. CHEM REC 2022:e202200200. [PMID: 36163471 DOI: 10.1002/tcr.202200200] [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: 08/08/2022] [Revised: 09/08/2022] [Indexed: 12/15/2022]
Abstract
Three-dimensional organic structures containing sp3 carbons bearing four non-hydrogen substituents can provide drug-like molecules. Although such complex structures are challenging targets in synthetic organic chemistry, efficient synthetic approaches will open a new chemical space for pharmaceutical candidates. This review provides an account of our recent achievements in developing organocatalytic approaches to attractive molecular platforms based on optically active sp3 carbons integrating four different functional groups. These methodologies include asymmetric cycloetherification and cyanation of multifunctional ketones, both of which take advantage of the mild characteristics of organocatalytic activation. Enzyme-like but non-enzymatic organocatalytic systems can be used to precisely manufacture molecules containing complex chiral structures without substrate specificity problems. In addition, these catalytic systems control not only stereoselectivity but also site-selectivity and do not induce side reactions even from substrates with rich functionality.
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Affiliation(s)
- Keisuke Asano
- Institute for Catalysis, Hokkaido University Sapporo, Hokkaido, 001-0021, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University Kyotodaigaku-Katsura, Nishikyo, Kyoto, 615-8510, Japan
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3
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Asano K. Multipoint Recognition of Molecular Conformations with Organocatalysts for Asymmetric Synthetic Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200343] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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4
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Kondoh A, Terada M. Development of Molecular Transformations on the Basis of Catalytic Generation of Anionic Species by Organosuperbase. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200308] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
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5
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Kopp J, Brückner R. Stereoselective Total Synthesis of the Dimeric Naphthoquinonopyrano-γ-lactone (-)-Crisamicin A: Introducing the Dimerization Site by a Late-Stage Hartwig Borylation. Org Lett 2020; 22:3607-3612. [PMID: 32298125 DOI: 10.1021/acs.orglett.0c01078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The first stereoselective total synthesis of the dimeric naphthoquinonopyrano-γ-lactone (-)-crisamicin A was realized (13 steps, 5% overall yield). 1,4,5-Trimethoxynaphthalene, reached in five known steps, was brominated at C-3 to install a but-3-enoic ester by an ensuing Heck coupling. An asymmetric Sharpless dihydroxylation followed and gave a β-hydroxy-γ-lactone with >99.9% ee. Its OH substituent and acetaldehyde established the dihydropyran ring in a completely diastereoselective oxa-Pictet-Spengler cyclization. The 2,3-fused anisole moiety allowed the C5-H bond under Hartwig's conditions to be borylated. This set the stage for engaging the resulting C5-B bond in an oxidative dimerization, which led to a binaphthohydroquinon-5-yl. The latter was advanced to synthetic crisamicin A by a double CAN oxidation (→ a binaphthoquinon-5-yl) and a double demethylation.
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Affiliation(s)
- Julia Kopp
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany
| | - Reinhard Brückner
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany
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6
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Murata K, Takeshita H, Sakamoto K, Fuwa H. Tandem Three‐Component Synthesis of
syn
‐1,2‐ and
syn
‐1,3‐Diol Derivatives. Chem Asian J 2020; 15:807-819. [DOI: 10.1002/asia.201901660] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/24/2020] [Indexed: 02/03/2023]
Affiliation(s)
- Keisuke Murata
- Department of Applied Chemistry Faculty of Science and EngineeringChuo University 1-13-27 Kasuga Bunkyo-ku, Tokyo 112-8551 Japan
| | - Hiroya Takeshita
- Department of Applied Chemistry Faculty of Science and EngineeringChuo University 1-13-27 Kasuga Bunkyo-ku, Tokyo 112-8551 Japan
| | - Keita Sakamoto
- Department of Applied Chemistry Faculty of Science and EngineeringChuo University 1-13-27 Kasuga Bunkyo-ku, Tokyo 112-8551 Japan
| | - Haruhiko Fuwa
- Department of Applied Chemistry Faculty of Science and EngineeringChuo University 1-13-27 Kasuga Bunkyo-ku, Tokyo 112-8551 Japan
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7
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Matsumoto A, Asano K, Matsubara S. Asymmetric
syn
‐1,3‐Dioxane Construction via Kinetic Resolution of Secondary Alcohols Using Chiral Phosphoric Acid Catalysts. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry Graduate School of EngineeringKyoto University Kyotodaigaku-katsura, Nishikyo Kyoto 615-8510 Japan
| | - Keisuke Asano
- Department of Material Chemistry Graduate School of EngineeringKyoto University Kyotodaigaku-katsura, Nishikyo Kyoto 615-8510 Japan
| | - Seijiro Matsubara
- Department of Material Chemistry Graduate School of EngineeringKyoto University Kyotodaigaku-katsura, Nishikyo Kyoto 615-8510 Japan
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8
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Reddy RR, Panda S, Ghorai P. Enantioselective Synthesis of Cyclohexadienone Containing Spiroketals via DyKat Ketalization/oxa-Michael Addition Cascade. J Org Chem 2019; 84:5357-5368. [PMID: 30884234 DOI: 10.1021/acs.joc.9b00371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An oxidative dearomatization of phenol followed by a dynamic kinetic (DyKat) ketalization/oxa-Michael addition cascade using cinchona alkaloid-based chiral bifunctional amino-squaramide catalysts is reported. A broad array of sterically hindered [5,5]-spiroketals attached to a cyclohexadienone moiety in spiro-fashion is synthesized in an enantiopure form. Further, the methodology was optimized and extended to the corresponding benzannulated [5,5]-spiroketals attached to a cyclohexadienone moiety in spiro-fashion. In general, good yields and excellent diastereoselectivies and enantioselectivities (up to 20:1 dr and up to 99% ee) were obtained.
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Affiliation(s)
- Reddy Rajasekhar Reddy
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
| | - Shibaram Panda
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
| | - Prasanta Ghorai
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal By-pass Road , Bhauri , Bhopal 462066 , India
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9
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Kurimoto Y, Nasu T, Fujii Y, Asano K, Matsubara S. Asymmetric Cycloetherification of in Situ Generated Cyanohydrins through the Concomitant Construction of Three Chiral Carbon Centers. Org Lett 2019; 21:2156-2160. [PMID: 30869909 DOI: 10.1021/acs.orglett.9b00462] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The organocatalytic enantio- and diastereoselective cycloetherification of in situ generated cyanohydrins through the concomitant construction of three chiral carbon centers is reported. This protocol facilitates the concise synthesis of optically active tetrahydropyran derivatives, which are ubiquitous scaffolds found in various bioactive compounds, through the simultaneous construction of multiple bonds and stereogenic centers, including tetrasubstituted chiral carbons. The resulting products also contain multiple synthetically important functional groups, which expand their possible usefulness as chiral building blocks.
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Affiliation(s)
- Yosuke Kurimoto
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Teruhisa Nasu
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Yuki Fujii
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
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10
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Matsumoto A, Asano K, Matsubara S. Organocatalytic Enantio- and Diastereoselective Construction of syn-1,3-Diol Motifs via Dynamic Kinetic Resolution of In Situ Generated Chiral Cyanohydrins. Org Lett 2019; 21:2688-2692. [DOI: 10.1021/acs.orglett.9b00677] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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11
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Azzena U, Carraro M, Pisano L, Monticelli S, Bartolotta R, Pace V. Cyclopentyl Methyl Ether: An Elective Ecofriendly Ethereal Solvent in Classical and Modern Organic Chemistry. CHEMSUSCHEM 2019; 12:40-70. [PMID: 30246930 PMCID: PMC6391966 DOI: 10.1002/cssc.201801768] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/23/2018] [Indexed: 05/07/2023]
Abstract
Solvents represent one of the major contributions to the environmental impact of fine-chemical synthesis. As a result, the use of environmentally friendly solvents in widely employed reactions is a challenge of vast real interest in contemporary organic chemistry. Within this Review, a great variety of examples showing how cyclopentyl methyl ether has been established as particularly useful for this purpose are reported. Indeed, its low toxicity, high boiling point, low melting point, hydrophobicity, chemical stability towards a wide range of conditions, exceptional stability towards the abstraction of hydrogen atoms, relatively low latent heat of vaporization, and the ease with which it can be recovered and recycled enable its successful employment as a solvent in a wide range of synthetic applications, including organometallic chemistry, catalysis, biphasic reactions, oxidations, and radical reactions.
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Affiliation(s)
- Ugo Azzena
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Massimo Carraro
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Luisa Pisano
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Serena Monticelli
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Roberta Bartolotta
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Vittorio Pace
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
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12
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Matsumoto A, Asano K, Matsubara S. Kinetic Resolution of Acylsilane Cyanohydrins via Organocatalytic Cycloetherification. Chem Asian J 2019; 14:116-120. [PMID: 30408346 DOI: 10.1002/asia.201801600] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/07/2018] [Indexed: 12/15/2022]
Abstract
An asymmetric cyanation of acylsilanes involving the in-situ formation of chiral acylsilane cyanohydrins followed by their kinetic resolution via organocatalytic cycloetherification is described. The highly enantio- and diastereoselective cycloetherification was crucial for achieving a high efficiency in the kinetic resolution. Consequently, acylsilane cyanohydrins containing a tetrasubstituted chiral carbon atom bearing silyl, cyano, and hydroxy groups were obtained in an enantioenriched form. This protocol therefore offers an efficient catalytic approach to optically active acylsilane cyanohydrins, which exhibit potential as chiral building blocks for the synthesis of pharmaceutically relevant chiral organosilanes.
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Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
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13
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Jiang X, Wang H, He H, Wang W, Wang Y, Ke Z, Yeung YY. Enantioseletive Fluorination of 3-Functionalized Oxindoles Using Electron-rich Amino Urea Catalyst. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xiaojian Jiang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Haitao Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Haoquan He
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Wei Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Yuqiang Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Zhihai Ke
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, NT; Hong Kong People's Republic of China
| | - Ying-Yeung Yeung
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, NT; Hong Kong People's Republic of China
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14
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Jiang X, Liu S, Yang S, Jing M, Xu L, Yu P, Wang Y, Yeung YY. Enantioselective Bromolactonization of Deactivated Olefinic Acids. Org Lett 2018; 20:3259-3262. [DOI: 10.1021/acs.orglett.8b01125] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xiaojian Jiang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Shenghui Liu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Si Yang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Mei Jing
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Lipeng Xu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Pei Yu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Yuqiang Wang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Ying-Yeung Yeung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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15
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Organocatalytic enantio- and diastereoselective cycloetherification via dynamic kinetic resolution of chiral cyanohydrins. Nat Commun 2017; 8:1397. [PMID: 29123080 PMCID: PMC5680189 DOI: 10.1038/s41467-017-01099-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 08/15/2017] [Indexed: 12/04/2022] Open
Abstract
Enantioselective approaches to synthesize six-membered oxacycles with multiple stereogenic centres are in high demand to enable the discovery of new therapeutic agents. Here we present a concise organocatalytic cycloetherification for the highly enantio- and diastereoselective synthesis of tetrahydropyrans involving simultaneous construction of two chiral centres, one of which is fully substituted. This method involves dynamic kinetic resolution of reversibly generated chiral cyanohydrins. A chiral bifunctional organocatalyst selectively recognizes a specific chair-like conformation of the intermediate, in which the small steric effect of the linear cyano group as well as its anomeric effect play important roles in controlling stereoselectivity. The products offer additional utility as synthetic intermediates because the cyano group can be further transformed into a variety of important functional groups. This strategy provides a platform to design efficient approaches to obtain a wide range of optically active tetrahydropyrans, which are otherwise synthetically challenging materials. Enantioselective synthesis of six-membered oxacycles with multiple stereogenic centres is essential for the discovery of new therapeutic agents. Here the authors show organocatalytic cycloetherification for the highly enantio- and diastereoselective synthesis of tetrahydropyrans.
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16
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Midya A, Maity S, Ghorai P. Dynamic Kinetic Spiroketalization/Oxa-Michael Addition Cascade of Alkoxyboronates and Peroxyacetals: Enantio- and Diastereoselective Synthesis of Benzannulated Spiroketals. Chemistry 2017. [DOI: 10.1002/chem.201701291] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Abhisek Midya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
| | - Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal 462066 India
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17
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Miyaji R, Wada Y, Matsumoto A, Asano K, Matsubara S. Bifunctional organocatalysts for the asymmetric synthesis of axially chiral benzamides. Beilstein J Org Chem 2017; 13:1518-1523. [PMID: 28845196 PMCID: PMC5550815 DOI: 10.3762/bjoc.13.151] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/18/2017] [Indexed: 01/03/2023] Open
Abstract
Bifunctional organocatalysts bearing amino and urea functional groups in a chiral molecular skeleton were applied to the enantioselective synthesis of axially chiral benzamides via aromatic electrophilic bromination. The results demonstrate the versatility of bifunctional organocatalysts for the enantioselective construction of axially chiral compounds. Moderate to good enantioselectivities were afforded with a range of benzamide substrates. Mechanistic investigations were also carried out.
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Affiliation(s)
- Ryota Miyaji
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Yuuki Wada
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Akira Matsumoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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18
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Wang Y, Huang G, Hu S, Jin K, Wu Y, Chen F. Enantioselective β -hydroxy thioesters formation via decarboxylative aldol reactions of malonic acid half thioesters with aldehydes promoted by chloramphenicol derived sulfonamides 1. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.066] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Orue A, Uria U, Roca-López D, Delso I, Reyes E, Carrillo L, Merino P, Vicario JL. Racemic hemiacetals as oxygen-centered pronucleophiles triggering cascade 1,4-addition/Michael reaction through dynamic kinetic resolution under iminium catalysis. Development and mechanistic insights. Chem Sci 2017; 8:2904-2913. [PMID: 28451356 PMCID: PMC5376714 DOI: 10.1039/c7sc00009j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 01/28/2017] [Indexed: 11/21/2022] Open
Abstract
2-Hydroxydihydropyran-5-ones behave as excellent polyfunctional reagents able to react with enals through oxa-Michael/Michael process cascade under the combination of iminium and enamine catalysis. These racemic hemiacetalic compounds are used as unconventional O-pronucleophiles in the initial oxa-Michael reaction, also leading to the formation of a single stereoisomer under a dynamic kinetic resolution (DKR) process. Importantly, by using β-aryl or β-alkyl substituted α,β-unsaturated substrates as initial Michael acceptors either kinetically or thermodynamically controlled diastereoisomers were formed with high stereoselection through the careful selection of the reaction conditions. Finally, a complete experimental and computational study confirmed the initially proposed DKR process during the catalytic oxa-Michael/Michael cascade reaction and also explained the kinetic/thermodynamic pathway operating in each case.
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Affiliation(s)
- Ane Orue
- Department of Organic Chemistry II , University of the Basque Country (UPV/EHU) , P.O. Box 644 , 48080 Bilbao , Spain
| | - Uxue Uria
- Department of Organic Chemistry II , University of the Basque Country (UPV/EHU) , P.O. Box 644 , 48080 Bilbao , Spain
| | - David Roca-López
- Departamento de Síntesis y Estructura de Biomoléculas , Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) , Universidad de Zaragoza , CSIC , Spain
| | - Ignacio Delso
- Servicio de Resonancia Magnética Nuclear , Centro de Química y Materiales de Aragón (CEQMA) , Universidad de Zaragoza , CSIC , Spain
| | - Efraím Reyes
- Department of Organic Chemistry II , University of the Basque Country (UPV/EHU) , P.O. Box 644 , 48080 Bilbao , Spain
| | - Luisa Carrillo
- Department of Organic Chemistry II , University of the Basque Country (UPV/EHU) , P.O. Box 644 , 48080 Bilbao , Spain
| | - Pedro Merino
- Departamento de Síntesis y Estructura de Biomoléculas , Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) , Universidad de Zaragoza , CSIC , Spain
| | - Jose L Vicario
- Department of Organic Chemistry II , University of the Basque Country (UPV/EHU) , P.O. Box 644 , 48080 Bilbao , Spain
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20
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Yoneda N, Matsumoto A, Asano K, Matsubara S. Asymmetric Cycloetherification via the Kinetic Resolution of Alcohols Using Chiral Phosphoric Acid Catalysts. CHEM LETT 2016. [DOI: 10.1246/cl.160727] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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21
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Reddy RR, Gudup SS, Ghorai P. Organocatalytic, Enantioselective Synthesis of Cyclohexadienone Containing Hindered Spirocyclic Ethers through an Oxidative Dearomatization/Oxa-Michael Addition Sequence. Angew Chem Int Ed Engl 2016; 55:15115-15119. [DOI: 10.1002/anie.201607039] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 08/24/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Reddy Rajasekhar Reddy
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Satish Sonbarao Gudup
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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22
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Reddy RR, Gudup SS, Ghorai P. Organocatalytic, Enantioselective Synthesis of Cyclohexadienone Containing Hindered Spirocyclic Ethers through an Oxidative Dearomatization/Oxa-Michael Addition Sequence. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Reddy Rajasekhar Reddy
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Satish Sonbarao Gudup
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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23
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Parhi B, Maity S, Ghorai P. Catalytic Asymmetric Conjugate Addition of Carboxylic Acids via Oxa-Michael Reaction of Peroxy Hemiacetals followed by Kornblum DeLaMare Fragmentation. Org Lett 2016; 18:5220-5223. [DOI: 10.1021/acs.orglett.6b02463] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Biswajit Parhi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass
Road, Bhauri, Bhopal 462066, India
| | - Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass
Road, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass
Road, Bhauri, Bhopal 462066, India
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24
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Grisin A, Oliver S, Ganton MD, Bacsa J, Evans PA. Diastereoselective construction of anti-4,5-disubstituted-1,3-dioxolanes via a bismuth-mediated two-component hemiacetal oxa-conjugate addition of γ-hydroxy-α,β-unsaturated ketones with paraformaldehyde. Chem Commun (Camb) 2016; 51:15681-4. [PMID: 26365112 DOI: 10.1039/c5cc01949d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The bismuth-mediated two-component hemiacetal oxa-conjugate addition of γ-hydroxy-α,β-unsaturated ketones with paraformaldehyde affords anti-4,5-disubstituted-1,3-dioxolanes in an efficient and stereoselective manner. The reaction provides a practical, inexpensive and atom-economical approach to these types of heterocycles, which represent useful intermediates for target-directed synthesis and precursors to syn-1,2-diols.
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Affiliation(s)
- Aleksandr Grisin
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada.
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25
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Parhi B, Gurjar J, Pramanik S, Midya A, Ghorai P. Organocatalytic Enantioselective Intramolecular Oxa-Michael Reaction of Enols: Synthesis of Chiral Isochromenes. J Org Chem 2016; 81:4654-63. [DOI: 10.1021/acs.joc.6b00565] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Biswajit Parhi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Jitendra Gurjar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Suman Pramanik
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Abhisek Midya
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462066, India
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26
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Shi R, Liu F. Quantum chemical study on the stability of honeybee queen pheromone against atmospheric factors. J Mol Model 2016; 22:140. [PMID: 27207255 DOI: 10.1007/s00894-016-2993-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/24/2016] [Indexed: 11/26/2022]
Abstract
The managed honeybee, Apis mellifera, has been experienced a puzzling event, termed as colony collapse disorder (CCD), in which worker bees abruptly disappear from their hives. Potential factors include parasites, pesticides, malnutrition, and environmental stresses. However, so far, no definitive relationship has been established between specific causal factors and CCD events. Here we theoretically test whether atmospheric environment could disturb the chemical communication between the queen and their workers in a colony. A quantum chemistry method has been used to investigate for the stability of the component of A. mellifera queen mandibular pheromone (QMP), (E)-9-keto-2-decenoic acid (9-ODA), against atmospheric water and free radicals. The results show that 9-ODA is less likely to react with water due to the high barrier heights (~36.5 kcal · mol(-1)) and very low reaction rates. However, it can easily react with triplet oxygen and hydroxyl radicals because of low or negative energy barriers. Thus, the atmospheric free radicals may disturb the chemical communication between the queen and their daughters in a colony. Our pilot study provides new insight for the cause of CCD, which has been reported throughout the world.
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Affiliation(s)
- Rongwei Shi
- Institute of Technical Biology & Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 350 Shushanhu Rd., Hefei, 230031, Anhui, China.
| | - Fanglin Liu
- Institute of Technical Biology & Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 350 Shushanhu Rd., Hefei, 230031, Anhui, China
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27
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Kalita AC, Gupta SK, Murugavel R. A Solvent Switch for the Stabilization of Multiple Hemiacetals on an Inorganic Platform: Role of Supramolecular Interactions. Chemistry 2016; 22:6863-75. [DOI: 10.1002/chem.201600409] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Alok Ch. Kalita
- Department of Chemistry; Indian Institute of Technology Bombay; Powai Mumbai 400 076 India
- Department of Chemistry; Cotton College; Guwahati 781001 India
| | - Sandeep K. Gupta
- Department of Chemistry; Indian Institute of Technology Bombay; Powai Mumbai 400 076 India
| | - Ramaswamy Murugavel
- Department of Chemistry; Indian Institute of Technology Bombay; Powai Mumbai 400 076 India
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28
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Maity S, Parhi B, Ghorai P. Enantio- and Diastereoselective Synthesis ofexo-Peroxyacetals: An Organocatalyzed Peroxyhemiacetalization/oxa-Michael Addition Cascade. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Sanjay Maity
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Biswajit Parhi
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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29
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Maity S, Parhi B, Ghorai P. Enantio- and Diastereoselective Synthesis ofexo-Peroxyacetals: An Organocatalyzed Peroxyhemiacetalization/oxa-Michael Addition Cascade. Angew Chem Int Ed Engl 2016; 55:7723-7. [DOI: 10.1002/anie.201511165] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/04/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Sanjay Maity
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Biswajit Parhi
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
| | - Prasanta Ghorai
- Department of Chemistry; Indian Institute of Science Education and Research (IISER) Bhopal; Bhopal By-pass Road, Bhauri Bhopal- 462066 India
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30
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Huang SH, Shih YW, Huang WT, Li DH, Yang TF. Tandem additions of 3,4-dihydroisoquinolines to γ-hydroxy-α,β-unsaturated ketones: a green and new access to oxazolo[2,3-a]tetrahydroisoquinolines. RSC Adv 2016. [DOI: 10.1039/c6ra20708a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Addition reactions of various 3,4-dihydroisoquinoline derivatives with γ-hydroxy-α,β-unsaturated ketones were carried out in 15 min at room temperature without an additive, providing oxazolo[2,3-a]tetrahydroisoquinoline derivatives in high yields.
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Affiliation(s)
- Sheng-Han Huang
- Department of Applied Chemistry
- National Chi Nan University
- Nantou
- Taiwan
| | - Yu-Wei Shih
- Department of Applied Chemistry
- National Chi Nan University
- Nantou
- Taiwan
| | - Wen-Tse Huang
- Department of Applied Chemistry
- National Chi Nan University
- Nantou
- Taiwan
| | - Deng-Hong Li
- Department of Applied Chemistry
- National Chi Nan University
- Nantou
- Taiwan
| | - Te-Fang Yang
- Department of Applied Chemistry
- National Chi Nan University
- Nantou
- Taiwan
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31
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32
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Li F, Wang J, Xu M, Zhao X, Zhou X, Zhao WX, Liu L. Catalytic stereoselective cascade reactions of quinols with trifluoromethyl ketones: direct access to CF3-containing 1,3-dioxolanes. Org Biomol Chem 2016; 14:3981-8. [DOI: 10.1039/c6ob00281a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A general and efficient synthesis of CF3-containing 1,3-dioxolanes using Et3N-catalyzed ketalization/oxa-Michael cascade of quinols with trifluoromethyl ketones is described. The desired products were obtained in 68%–95% yields with acceptable diastereoselectivities.
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Affiliation(s)
- Feng Li
- College of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- China
| | - Jingjing Wang
- College of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- China
| | - Mengmeng Xu
- College of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- China
| | - Xiaobo Zhao
- College of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- China
| | - Xiaohong Zhou
- College of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- China
| | - Wen-Xian Zhao
- College of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- China
| | - Lantao Liu
- College of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- China
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33
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Rathore KS, Lad BS, Chennamsetti H, Katukojvala S. An unprecedented benzannulation of oxindoles with enalcarbenoids: a regioselective approach to functionalized carbazoles. Chem Commun (Camb) 2016; 52:5812-5. [DOI: 10.1039/c5cc10637k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An unusual rhodium-catalyzed tandem reaction of oxindoles with diazoenals involving the cleavage of sp2 C–O and sp2 C–C bonds resulted in the formation of 1-hydroxy-2-acylcarbazoles.
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Affiliation(s)
| | - Bapurao Sudam Lad
- Department of Chemistry
- Indian Institute of Science Education & Research
- Bhopal
- India
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34
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Yoneda N, Fukata Y, Asano K, Matsubara S. Asymmetric Synthesis of Spiroketals with Aminothiourea Catalysts. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508405] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Yoneda N, Fukata Y, Asano K, Matsubara S. Asymmetric Synthesis of Spiroketals with Aminothiourea Catalysts. Angew Chem Int Ed Engl 2015; 54:15497-500. [DOI: 10.1002/anie.201508405] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Naoki Yoneda
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
| | - Yukihiro Fukata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku‐Katsura, Nishikyo, Kyoto 615‐8510 (Japan)
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36
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Kondoh A, Odaira K, Terada M. Ring expansion of epoxides under Brønsted base catalysis: formal [3+2] cycloaddition of β,γ-epoxy esters with imines providing 2,4,5-trisubstituted 1,3-oxazolidines. Angew Chem Int Ed Engl 2015; 54:11240-4. [PMID: 26352032 DOI: 10.1002/anie.201505893] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 07/17/2015] [Indexed: 11/07/2022]
Abstract
A novel ring-expansion reaction of epoxides under Brønsted base catalysis was developed. The formal [3+2] cycloaddition reaction of β,γ-epoxy esters with imines proceeds in the presence of triazabicyclodecene (TBD) as a superior Brønsted base catalyst to afford 2,4,5-trisubstituted 1,3-oxazolidines in a highly diastereoselective manner. This reaction involves the ring opening of the epoxides with the aid of the Brønsted base catalyst to generate α,β-unsaturated esters having an alkoxide at the allylic position, which would formally serve as a synthetic equivalent of the 1,3-dipole, followed by a cycloaddition reaction with imines in a stepwise fashion. This methodology enables the facile synthesis of enantioenriched 1,3-oxazolidines from easily accessible enantioenriched epoxides.
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Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578 (Japan)
| | - Kenta Odaira
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578 (Japan)
| | - Masahiro Terada
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578 (Japan). .,Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578 (Japan).
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37
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Kondoh A, Odaira K, Terada M. Ring Expansion of Epoxides under Brønsted Base Catalysis: Formal [3+2] Cycloaddition of β,γ-Epoxy Esters with Imines Providing 2,4,5-Trisubstituted 1,3-Oxazolidines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505893] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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Raveendra B, Maity S, Das BG, Ghorai P. Organocatalytic, Enantioselective Synthesis of 1- and 3-Substituted Isochromans via Intramolecular Oxa-Michael Reaction of Alkoxyboronate: Synthesis of (+)-Sonepiprazole. J Org Chem 2015; 80:7008-18. [PMID: 26102523 DOI: 10.1021/acs.joc.5b00719] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The enantioselective oxa-Michael reaction of alkoxyboronate strategy was demonstrated to provide a new and practical route to enantioriched 1- and 3-substituted isochromans using a chiral bifunctional organocatalyst. Furthermore, this methodology was extended to the enantioselective synthesis of (+)-sonepiprazole, a dopamine receptor antagonist.
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Affiliation(s)
- Barnala Raveendra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
| | - Sanjay Maity
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
| | - Braja Gopal Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhauri, Bhopal-462066, India
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39
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Miyaji R, Asano K, Matsubara S. Bifunctional Organocatalysts for the Enantioselective Synthesis of Axially Chiral Isoquinoline N-Oxides. J Am Chem Soc 2015; 137:6766-9. [DOI: 10.1021/jacs.5b04151] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ryota Miyaji
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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40
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Younai A, Zeng BS, Meltzer HY, Scheidt KA. Enantioselective Syntheses of Heteroyohimbine Natural Products: A Unified Approach through Cooperative Catalysis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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41
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Younai A, Zeng BS, Meltzer HY, Scheidt KA. Enantioselective Syntheses of Heteroyohimbine Natural Products: A Unified Approach through Cooperative Catalysis. Angew Chem Int Ed Engl 2015; 54:6900-4. [DOI: 10.1002/anie.201502011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Indexed: 12/28/2022]
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42
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Matsumoto A, Asano K, Matsubara S. A chiral phosphoric acid catalyst for asymmetric construction of 1,3-dioxanes. Chem Commun (Camb) 2015; 51:11693-6. [DOI: 10.1039/c5cc04124d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A chiral phosphoric acid catalyst enabled enantioselective 1,3-dioxane construction, useful for polyketide motif synthesis, via a hemiacetalization/intramolecular oxy-Michael addition cascade.
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Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Keisuke Asano
- Department of Material Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Seijiro Matsubara
- Department of Material Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
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43
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Yoneda N, Hotta A, Asano K, Matsubara S. Asymmetric Oxy-Michael Addition to γ-Hydroxy-α,β-Unsaturated Carbonyls Using Formaldehyde as an Oxygen-Centered Nucleophile. Org Lett 2014; 16:6264-6. [DOI: 10.1021/ol503104b] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Naoki Yoneda
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Ayano Hotta
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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44
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Raveendra B, Das BG, Ghorai P. Organocatalytic, enantioselective, intramolecular oxa-Michael reaction of alkoxyboronate: a new strategy for enantioenriched 1-substituted 1,3-dihydroisobenzofurans. Org Lett 2014; 16:5580-3. [PMID: 25337660 DOI: 10.1021/ol502614n] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An unprecedented strategy for the synthesis of enantioenriched 1-substituted 1,3-dihydroisobenzofurans via an enantioselective oxa-Michael reaction of o-alkoxyboronate containing chalcone (II) has been accomplished employing cinchona alkaloid based squaramide bifunctional organocatalyst in the presence of proton source. The corresponding alkoxyboronate intermediates have been readily prepared in situ from o-formyl chalcones using neutral borane as hydride source and a tertiary amine moiety which is a counterpart of the catalyst.
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Affiliation(s)
- Barnala Raveendra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal 462066, India
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45
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Rubush DM, Rovis T. Stereoselective Synthesis of Dioxolanes and Oxazolidines via a Desymmetrization Acetalization/Michael Cascade. Synlett 2014; 25:713-717. [PMID: 25960607 PMCID: PMC4422513 DOI: 10.1055/s-0033-1340669] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The desymmetrization of p-quinols using a Brønsted acid catalyzed acetalization/Michael cascade was achieved in high yields and diastereoselectivities for aldehydes and imines. Use of a chiral Brønsted acid allowed for the synthesis of 1,3-dioxolane and 1,3-oxazolidine products in modest enantioselectivity.
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Affiliation(s)
- David M. Rubush
- Colorado State University, Department of Chemistry, Fort Collins, CO 80523
| | - Tomislav Rovis
- Colorado State University, Department of Chemistry, Fort Collins, CO 80523
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46
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Miyaji R, Asano K, Matsubara S. Asymmetric chroman synthesis via an intramolecular oxy-Michael addition by bifunctional organocatalysts. Org Biomol Chem 2014; 12:119-22. [DOI: 10.1039/c3ob41938j] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Qiu L, Guo X, Ma C, Qiu H, Liu S, Yang L, Hu W. Efficient synthesis of chiral cyclic acetals by metal and Brønsted acid co-catalyzed enantioselective four-component cascade reactions. Chem Commun (Camb) 2014; 50:2196-8. [DOI: 10.1039/c3cc49063g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four-component Mannich reactions subsequently followed by an intramolecular oxo-Michael addition were developed to efficiently produce chiral cyclic acetals with high diastereoselectivity and enantioselectivity.
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Affiliation(s)
- Lin Qiu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Xin Guo
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Chaoqun Ma
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Huang Qiu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Shunying Liu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Liping Yang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Wenhao Hu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
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48
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Organocatalytic asymmetric synthesis of 3(2H)-furanones with adjacent quaternary and tertiary stereocenters. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.09.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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49
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Kobayashi Y, Taniguchi Y, Hayama N, Inokuma T, Takemoto Y. A Powerful Hydrogen-Bond-Donating Organocatalyst for the Enantioselective Intramolecular Oxa-Michael Reaction of α,β-Unsaturated Amides and Esters. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305492] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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50
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Kobayashi Y, Taniguchi Y, Hayama N, Inokuma T, Takemoto Y. A Powerful Hydrogen-Bond-Donating Organocatalyst for the Enantioselective Intramolecular Oxa-Michael Reaction of α,β-Unsaturated Amides and Esters. Angew Chem Int Ed Engl 2013; 52:11114-8. [DOI: 10.1002/anie.201305492] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Indexed: 11/10/2022]
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