1
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Wang Y, Young CM, Cordes DB, Slawin AMZ, Smith AD. Probing Regio- and Enantioselectivity in the Formal [2 + 2] Cycloaddition of C(1)-Alkyl Ammonium Enolates with β- and α,β-Substituted Trifluoromethylenones. J Org Chem 2023. [PMID: 37184337 DOI: 10.1021/acs.joc.2c02688] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The isothiourea-catalyzed regio- and enantioselective formal [2 + 2] cycloaddition of C(1)-alkyl and C(1)-unsubstituted ammonium enolates with β- and α,β-substituted trifluoromethylenones has been developed. In all cases, preferential [2 + 2]-cycloaddition over the alternative [4 + 2]-cycloaddition is observed, giving β-lactones with excellent diastereo- and enantioselectivity (34 examples, up to >95:5 dr, >99:1 er). The regioselectivity of the process was dictated by the nature of the substituents on both reaction components. Solely [2 + 2] cycloaddition products are observed when using α,β-substituted trifluoromethylenones or α-trialkylsilyl acetic acid derivatives; both [2 + 2] and [4 + 2] cycloaddition products are observed when using β-substituted trifluoromethylenones and α-alkyl-α-trialkylsilyl acetic acids as reactants, with the [2 + 2] cycloaddition as the major reaction product. The beneficial role of the α-silyl substituent within the acid component in this protocol has been demonstrated by control experiments.
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Affiliation(s)
- Yihong Wang
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Claire M Young
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
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2
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Witte JM, Service J, Addo MA, Semakieh B, Collins E, Sams C, Dorsey TR, Garrelts E, Blumenshine CA, Cooper T, Martinez M, Hamaker CG, Ferrence GM, Hitchcock SR. Diastereoselective and Enantioselective Synthesis of α- p-Methoxyphenoxy-β-Lactones: Dependence on the Stereoelectronic Properties of the β-Hydroxy-α- p-Methoxyphenoxycarboxylic Acid Precursors. J Org Chem 2022; 87:9619-9634. [PMID: 35862509 DOI: 10.1021/acs.joc.2c00608] [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
Treatment of β-hydroxy-α-p-methoxyphenoxy carboxylic acids derived from the asymmetric glycolate aldol addition reaction with p-nitrobenzenesulfonyl chloride yielded divergent results depending on the nature of the β-substituent of the carboxylic acid. Substrates bearing either alkyl substituents (R = -n-butyl, -n-octyl, -benzyl, isopropyl, -tert-butyl) or aryl systems bearing electron-withdrawing substituents (R = -p-C6H4Cl, -p-C6H4Br, -p-C6H4NO2) yielded β-lactones. In contrast, α-p-methoxyphenoxy-β-hydroxycarboxylic acids bearing electron-donating aryl groups or the sterically demanding 2-naphthyl group formed (Z)-alkenes.
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Affiliation(s)
- Jordan M Witte
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Jasmine Service
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Marian Aba Addo
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Bader Semakieh
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Erin Collins
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Christopher Sams
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Timothy R Dorsey
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Elizabeth Garrelts
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Cassidy A Blumenshine
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Trace Cooper
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Moses Martinez
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Christopher G Hamaker
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Gregory M Ferrence
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
| | - Shawn R Hitchcock
- Department of Chemistry, Illinois State University, Normal, Illinois 61790-4160, United States
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3
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Meng X, Wang M, Hu C, Su Z. Asymmetric [2 + 2] cycloaddition of isatin with ketene catalyzed by N, N'-dioxide-Sc(III) complex: Mechanism and selectivity. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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4
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Ibrahim AA, Wei PH, Harzmann GD, Nalla D, Mondal M, Wheeler KA, Kerrigan NJ. Phosphine-catalyzed stereoselective dimerizations of ketenes. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131838] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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5
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Huang Y, Liao J, Wang W, Liu H, Guo H. Synthesis of heterocyclic compounds through nucleophilic phosphine catalysis. Chem Commun (Camb) 2020; 56:15235-15281. [PMID: 33320123 DOI: 10.1039/d0cc05699e] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Nucleophilic phosphine catalysis is a practical and powerful tool for the synthesis of various heterocyclic compounds with the advantages of environmentally friendly, metal-free, and mild reaction conditions. The present report summarizes the construction of four to eight-membered heterocyclic compounds containing nitrogen, oxygen and sulphur atoms through phosphine-catalyzed intramolecular annulations and intermolecular [2+2], [3+2], [4+1], [3+1+1], [5+1], [4+2], [2+2+2], [3+3], [4+3] and [3+2+3] annulations of electron-deficient alkenes, allenes, alkynes and Morita-Baylis-Hillman carbonates.
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Affiliation(s)
- Yifan Huang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, China.
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6
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Affiliation(s)
- Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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7
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Fan T, Zhang ZJ, Zhang YC, Song J. Construction of All-Carbon Quaternary Stereocenters via Sequential Photoactivation/Isothiourea Catalysis. Org Lett 2019; 21:7897-7901. [DOI: 10.1021/acs.orglett.9b02892] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Tao Fan
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zi-Jing Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yu-Chen Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Jin Song
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
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8
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Wang C, Chen Y, Li J, Zhou L, Wang B, Xiao Y, Guo H. Phosphine-Catalyzed Asymmetric Cycloaddition Reaction of Diazenes: Enantioselective Synthesis of Chiral Dihydropyrazoles. Org Lett 2019; 21:7519-7523. [DOI: 10.1021/acs.orglett.9b02800] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chang Wang
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yuehua Chen
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Jingyu Li
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Leijie Zhou
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Bo Wang
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yumei Xiao
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Hongchao Guo
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
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9
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Barrios Antúnez DJ, Greenhalgh MD, Brueckner AC, Walden DM, Elías-Rodríguez P, Roberts P, Young BG, West TH, Slawin AMZ, Ha-Yeon Cheong P, Smith AD. Catalytic enantioselective synthesis of perfluoroalkyl-substituted β-lactones via a concerted asynchronous [2 + 2] cycloaddition: a synthetic and computational study. Chem Sci 2019; 10:6162-6173. [PMID: 31360423 PMCID: PMC6585878 DOI: 10.1039/c9sc00390h] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/27/2019] [Indexed: 11/21/2022] Open
Abstract
The enantioselective preparation of a range of perfluoroalkyl-substituted β-lactones through an isothiourea (HyperBTM) catalysed reaction using symmetric anhydrides as ammonium enolate precursors and perfluoroalkylketones (RF = CF3, C2F5, C4F9) is reported. Following optimisation, high diastereo- and enantioselectivity was observed for β-lactone formation using C2F5- and C4F9-substituted ketones at room temperature (26 examples, up to >95 : 5 dr and >99 : 1 er), whilst -78 °C was necessary for optimal dr and er with CF3-substituted ketones (11 examples, up to >95 : 5 dr and >99 : 1 er). Derivatisation of the β-lactones through ring-opening, as well as a two-step conversion to give perfluoroalkyl-substituted oxetanes, is demonstrated without loss of stereochemical integrity. Density functional theory computations, alongside 13C natural abundance KIE studies, have been used to probe the reaction mechanism with a concerted asynchronous [2 + 2]-cycloaddition pathway favoured over a stepwise aldol-lactonisation process.
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Affiliation(s)
| | - Mark D Greenhalgh
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , KY16 9ST , UK .
| | - Alexander C Brueckner
- Department of Chemistry , Oregon State University , 153 Gilbert Hall , Corvallis , Oregon 97333 , USA .
| | - Daniel M Walden
- Department of Chemistry , Oregon State University , 153 Gilbert Hall , Corvallis , Oregon 97333 , USA .
| | - Pilar Elías-Rodríguez
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , KY16 9ST , UK .
| | - Patrick Roberts
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , KY16 9ST , UK .
| | - Benjamin G Young
- Department of Chemistry, Physics, and Engineering , Biola University , 315 Lim Center , La Mirada , California 90639 , USA
| | - Thomas H West
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , KY16 9ST , UK .
| | - Alexandra M Z Slawin
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , KY16 9ST , UK .
| | - Paul Ha-Yeon Cheong
- Department of Chemistry , Oregon State University , 153 Gilbert Hall , Corvallis , Oregon 97333 , USA .
| | - Andrew D Smith
- EaStCHEM , School of Chemistry , University of St Andrews , North Haugh , St Andrews , KY16 9ST , UK .
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10
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Hubbell AK, LaPointe AM, Lamb JR, Coates GW. Regioselective Carbonylation of 2,2-Disubstituted Epoxides: An Alternative Route to Ketone-Based Aldol Products. J Am Chem Soc 2019; 141:2474-2480. [DOI: 10.1021/jacs.8b12286] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Aran K. Hubbell
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Anne M. LaPointe
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Jessica R. Lamb
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Geoffrey W. Coates
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
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11
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Abstract
The hallmark of nucleophilic phosphine catalysis is the initial nucleophilic addition of a phosphine to an electrophilic starting material, producing a reactive zwitterionic intermediate, generally under mild conditions. In this Review, we classify nucleophilic phosphine catalysis reactions in terms of their electrophilic components. In the majority of cases, these electrophiles possess carbon-carbon multiple bonds: alkenes (section 2), allenes (section 3), alkynes (section 4), and Morita-Baylis-Hillman (MBH) alcohol derivatives (MBHADs; section 5). Within each of these sections, the reactions are compiled based on the nature of the second starting material-nucleophiles, dinucleophiles, electrophiles, and electrophile-nucleophiles. Nucleophilic phosphine catalysis reactions that occur via the initial addition to starting materials that do not possess carbon-carbon multiple bonds are collated in section 6. Although not catalytic in the phosphine, the formation of ylides through the nucleophilic addition of phosphines to carbon-carbon multiple bond-containing compounds is intimately related to the catalysis and is discussed in section 7. Finally, section 8 compiles miscellaneous topics, including annulations of the Hüisgen zwitterion, phosphine-mediated reductions, iminophosphorane organocatalysis, and catalytic variants of classical phosphine oxide-generating reactions.
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Affiliation(s)
- Hongchao Guo
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yi Chiao Fan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095-1569, USA
| | - Zhanhu Sun
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yang Wu
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, CA 90095-1569, USA
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12
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Affiliation(s)
- Huanzhen Ni
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Wai-Lun Chan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
| | - Yixin Lu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543 Singapore
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13
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Mukherjee S, Biju AT. Recent Advances in the Organocatalytic Enantioselective Synthesis of Functionalized β-Lactones. Chem Asian J 2018; 13:2333-2349. [DOI: 10.1002/asia.201800902] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/20/2018] [Indexed: 01/25/2023]
Affiliation(s)
- Subrata Mukherjee
- Organic Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
| | - Akkattu T. Biju
- Department of Organic Chemistry; Indian Institute of Science; Bangalore 560012 India
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14
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Dan HG, Rao GW. Recent Advances in Amino Acid-Based Phosphine Catalysts and Their Applications in Asymmetric Reactions. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s1070428018060015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Hu X, Chen X, Shao Y, Xie H, Deng Y, Ke Z, Jiang H, Zeng W. Co(III)-Catalyzed Coupling-Cyclization of Aryl C–H Bonds with α-Diazoketones Involving Wolff Rearrangement. ACS Catal 2018. [DOI: 10.1021/acscatal.7b03668] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xinwei Hu
- Key
Laboratory of Functional Molecular Engineering of Guangdong Province,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Xun Chen
- Key
Laboratory of Functional Molecular Engineering of Guangdong Province,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
- School
of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Youxiang Shao
- School
of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haisheng Xie
- Key
Laboratory of Functional Molecular Engineering of Guangdong Province,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Yuanfu Deng
- Key
Laboratory of Functional Molecular Engineering of Guangdong Province,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Zhuofeng Ke
- School
of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Huanfeng Jiang
- Key
Laboratory of Functional Molecular Engineering of Guangdong Province,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Wei Zeng
- Key
Laboratory of Functional Molecular Engineering of Guangdong Province,
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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16
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Ji X, Cao WG, Zhao G. Dual-reagent organophosphine catalyzed asymmetric Mannich reactions of isocyanoacetates with N -Boc-aldimines. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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17
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Li H, Lu Y. Enantioselective Construction of All-Carbon Quaternary Stereogenic Centers by Using Phosphine Catalysis. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700220] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Huilin Li
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Yixin Lu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
- National University of Singapore (Suzhou); Research Institute; 377 Lin Quan Street, Suzhou Industrial Park Suzhou Jiangsu 215123 P. R. China
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18
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Zhang JQ, Li NK, Yin SJ, Sun BB, Fan WT, Wang XW. Chiral N-Heterocyclic Carbene-Catalyzed Asymmetric Michael-Intramolecular Aldol-Lactonization Cascade for Enantioselective Construction of β-Propiolactone-Fused Spiro[cyclopentane-oxindoles]. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601259] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jun-Qi Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Nai-Kai Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Shao-Jie Yin
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Bing-Bing Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Wei-Tai Fan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Xing-Wang Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
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19
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Zhou T, Li S, Huang B, Li C, Zhao Y, Chen J, Chen A, Xiao Y, Liu L, Zhang J. Phosphine-catalyzed Friedel–Crafts reaction of naphthols with para-quinone methides: expedient access to triarylmethanes. Org Biomol Chem 2017; 15:4941-4945. [DOI: 10.1039/c7ob00911a] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel phosphine-catalyzed Friedel–Crafts reaction of naphthols with para-quinone methides has been developed.
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Affiliation(s)
- Tao Zhou
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Shenhuan Li
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Ben Huang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Cao Li
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Yang Zhao
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Jieqiong Chen
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Aoling Chen
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Yuanjin Xiao
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Lu Liu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
| | - Junliang Zhang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- China
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20
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Chen S, Ibrahim AA, Peraino NJ, Nalla D, Mondal M, Van Raaphorst M, Kerrigan NJ. Catalytic Asymmetric Synthesis of Ketene Heterodimer β-Lactones: Scope and Limitations. J Org Chem 2016; 81:7824-37. [PMID: 27490092 DOI: 10.1021/acs.joc.6b01481] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this article we describe extensive studies of the catalytic asymmetric heterodimerization of ketenes to give ketene heterodimer β-lactones. The optimal catalytic system was determined to be a cinchona alkaloid derivative (TMS-quinine or Me-quinidine). The desired ketene heterodimer β-lactones were obtained in good to excellent yields (up to 90%), with excellent levels of enantioselectivity (≥90% ee for 33 Z and E isomer examples), good to excellent (Z)-olefin isomer selectivity (≥90:10 for 20 examples), and excellent regioselectivity (only one regioisomer formed). Full details of catalyst development studies, catalyst loading investigations, substrate scope exploration, protocol innovations (including double in situ ketene generation for 7 examples), and an application to a cinnabaramide A intermediate are described. The addition of lithium perchlorate (1-2 equiv) as an additive to the alkaloid catalyst system was found to favor formation of the E isomer of the ketene heterodimer. Ten examples were formed with moderate to excellent (E)-olefin isomer selectivity (74:25 to 97:3) and with excellent enantioselectivity (84-98% ee).
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Affiliation(s)
- Shi Chen
- Department of Chemistry, Oakland University , 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Ahmad A Ibrahim
- Department of Chemistry, Oakland University , 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Nicholas J Peraino
- Department of Chemistry, Oakland University , 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Divya Nalla
- Department of Chemistry, Oakland University , 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Mukulesh Mondal
- Department of Chemistry, Oakland University , 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Maxwell Van Raaphorst
- Department of Chemistry, Oakland University , 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Nessan J Kerrigan
- Department of Chemistry, Oakland University , 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
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21
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Bayardon J, Rousselin Y, Jugé S. Designing P-Chirogenic 1,2-Diphosphinobenzenes at Both P-Centers Using P(III)-Phosphinites. Org Lett 2016; 18:2930-3. [DOI: 10.1021/acs.orglett.6b01275] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Jérôme Bayardon
- Institut
de Chimie Moléculaire
de l’Université de Bourgogne (ICMUB-StéréochIM),
UMR CNRS 6302, 9 Avenue Alain Savary, BP 47870-21078 Cedex Dijon, France
| | - Yoann Rousselin
- Institut
de Chimie Moléculaire
de l’Université de Bourgogne (ICMUB-StéréochIM),
UMR CNRS 6302, 9 Avenue Alain Savary, BP 47870-21078 Cedex Dijon, France
| | - Sylvain Jugé
- Institut
de Chimie Moléculaire
de l’Université de Bourgogne (ICMUB-StéréochIM),
UMR CNRS 6302, 9 Avenue Alain Savary, BP 47870-21078 Cedex Dijon, France
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22
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Jin QW, Chai Z, Huang YM, Zou G, Zhao G. Asymmetric α-amination of 3-substituted oxindoles using chiral bifunctional phosphine catalysts. Beilstein J Org Chem 2016; 12:725-31. [PMID: 27340464 PMCID: PMC4902028 DOI: 10.3762/bjoc.12.72] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 04/05/2016] [Indexed: 11/23/2022] Open
Abstract
A highly enantioselective α-amination of 3-substituted oxindoles with azodicarboxylates catalyzed by amino acids-derived chiral phosphine catalysts is reported. The corresponding products containing a tetrasubstituted carbon center attached to a nitrogen atom at the C-3 position of the oxindole were obtained in high yields and with up to 98% ee.
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Affiliation(s)
- Qiao-Wen Jin
- Laboratory of Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People’s Republic of China
| | - Zhuo Chai
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - You-Ming Huang
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Gang Zou
- Laboratory of Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People’s Republic of China
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
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23
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24
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Mondal M, Chen S, Othman N, Wheeler KA, Kerrigan NJ. Phosphine-Catalyzed Diastereoselective Synthesis of β-Lactones from Disubstituted Ketenes and α-Chiral Oxyaldehydes. J Org Chem 2015; 80:5789-94. [DOI: 10.1021/acs.joc.5b00869] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mukulesh Mondal
- Department
of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Shi Chen
- Department
of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Nabil Othman
- Department
of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Kraig A. Wheeler
- Department
of Chemistry, Eastern Illinois University, 600 Lincoln Avenue, Charleston, Illinois 61920-3099, United States
| | - Nessan J. Kerrigan
- Department
of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
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25
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Lou YP, Zheng CW, Pan RM, Jin QW, Zhao G, Li Z. Enantioselective Direct Mannich Reactions of Cyclic β-Ketoesters Catalyzed by Chiral Phosphine via a Novel Dual-Reagent Catalysis. Org Lett 2015; 17:688-91. [DOI: 10.1021/ol503712m] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yan-Peng Lou
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Chang-Wu Zheng
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ren-Ming Pan
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Qiao-Wen Jin
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Gang Zhao
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhong Li
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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26
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Heimgartner H, Mlostoń G, Urbaniak K, Szychowska A, Linden A. Thermal [2+2]-Cycloadditions of Diphenylketene with Aryl- and Hetaryl-Substituted Thioketones. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(k)56] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Wang HY, Zhang K, Zheng CW, Chai Z, Cao DD, Zhang JX, Zhao G. Asymmetric Dual-Reagent Catalysis: Mannich-type Reactions Catalyzed by Ion Pair. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409342] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Wang HY, Zhang K, Zheng CW, Chai Z, Cao DD, Zhang JX, Zhao G. Asymmetric Dual-Reagent Catalysis: Mannich-type Reactions Catalyzed by Ion Pair. Angew Chem Int Ed Engl 2014; 54:1775-9. [DOI: 10.1002/anie.201409342] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 11/14/2014] [Indexed: 11/06/2022]
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29
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Mulzer M, Coates GW. Carbonylation of cis-Disubstituted Epoxides to trans-β-Lactones: Catalysts Displaying Steric and Contrasteric Regioselectivity. J Org Chem 2014; 79:11851-62. [DOI: 10.1021/jo501899e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Michael Mulzer
- Department of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Geoffrey W. Coates
- Department of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
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30
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Mulzer M, Lamb JR, Nelson Z, Coates GW. Carbonylative enantioselective meso-desymmetrization of cis-epoxides to trans-β-lactones: effect of salen-ligand electronic variation on enantioselectivity. Chem Commun (Camb) 2014; 50:9842-5. [DOI: 10.1039/c4cc04397a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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31
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Peraino NJ, Ho HJ, Mondal M, Kerrigan NJ. Asymmetric synthesis of γ-lactones through reaction of sulfoxonium ylides, aldehydes, and ketenes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Wei Y, Shi M. Applications of Chiral Phosphine-Based Organocatalysts in Catalytic Asymmetric Reactions. Chem Asian J 2014; 9:2720-34. [DOI: 10.1002/asia.201402109] [Citation(s) in RCA: 155] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Indexed: 12/25/2022]
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33
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Chen S, Mondal M, Ibrahim AA, Wheeler KA, Kerrigan NJ. Phosphine-Catalyzed Asymmetric Synthesis of β-Lactones from Disubstituted Ketenes and Aldehydes. J Org Chem 2014; 79:4920-9. [DOI: 10.1021/jo500486e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shi Chen
- Department of Chemistry, Oakland University, 2200 North
Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Mukulesh Mondal
- Department of Chemistry, Oakland University, 2200 North
Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Ahmad A. Ibrahim
- Department of Chemistry, Oakland University, 2200 North
Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Kraig A. Wheeler
- Department of Chemistry, Eastern Illinois University, 600 Lincoln Avenue, Charleston, Illinois 61920-3099, United States
| | - Nessan J. Kerrigan
- Department of Chemistry, Oakland University, 2200 North
Squirrel Road, Rochester, Michigan 48309-4477, United States
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34
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Ketenes as Privileged Synthons in the Syntheses of Heterocyclic Compounds. Part 1. ADVANCES IN HETEROCYCLIC CHEMISTRY 2014. [DOI: 10.1016/b978-0-12-800170-7.00004-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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35
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Mulzer M, Ellis WC, Lobkovsky EB, Coates GW. Enantioenriched β-lactone and aldol-type products from regiodivergent carbonylation of racemic cis-epoxides. Chem Sci 2014. [DOI: 10.1039/c4sc00075g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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36
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Hao X, Liu X, Li W, Tan F, Chu Y, Zhao X, Lin L, Feng X. Chiral Lewis acid catalyzed asymmetric cycloadditions of disubstituted ketenes for the synthesis of β-lactones and δ-lactones. Org Lett 2013; 16:134-7. [PMID: 24303985 DOI: 10.1021/ol4031217] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Highly diastereo- and enantioselective [2 + 2]- and [4 + 2]-cycloadditions of disubstituted ketenes were realized by chiral Lewis acid catalysis. A series of arylalkylketenes underwent the reaction smoothly with isatins and β,γ-unsaturated α-ketoesters, providing optically active β-lactones and δ-lactones with vicinal chiral centers in excellent yields (up to 99%) and enantioselectivities (up to 99% ee), as well as exclusively high diastereoselectivities under 0.2-2 mol % catalyst loading.
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Affiliation(s)
- Xiaoyu Hao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, P. R. China
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37
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Douglas J, Taylor JE, Churchill G, Slawin AMZ, Smith AD. NHC-Promoted Asymmetric β-Lactone Formation from Arylalkylketenes and Electron-Deficient Benzaldehydes or Pyridinecarboxaldehydes. J Org Chem 2013; 78:3925-38. [DOI: 10.1021/jo4003079] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James Douglas
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - James E. Taylor
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - Gwydion Churchill
- AstraZeneca, Process Research and Development, Macclesfield, Cheshire SK10 2NA, U.K
| | - Alexandra M. Z. Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
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38
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Ganji P, Ibrahim H. The first asymmetric ring-expansion carbonylation of meso-epoxides. Chem Commun (Camb) 2013; 48:10138-40. [PMID: 22951811 DOI: 10.1039/c2cc35596e] [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
The first asymmetric ring-expansion carbonylation of meso-epoxides to β-lactones is reported. Two structurally diverse chiral Cr(III) chloro complexes in conjunction with Co(2)(CO)(8) were shown to be competent catalytic systems for this transformation, displaying significant levels of asymmetric induction of up to 56% ee.
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Affiliation(s)
- Prasad Ganji
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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39
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Deng JC, Chan FW, Kuo CW, Cheng CA, Huang CY, Chuang SC. Assembly of Dimethyl Acetylenedicarboxylate and Phosphanes with Aldehydes Leading to γ-Lactones Bearing α-Phosphorus Ylides as Wittig Reagents. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200400] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Cooperative Al(salen)-pyridinium catalysts for the asymmetric synthesis of trans-configured β-lactones by [2+2]-cyclocondensation of acylbromides and aldehydes: investigation of pyridinium substituent effects. Molecules 2012; 17:7121-50. [PMID: 22692239 PMCID: PMC6268914 DOI: 10.3390/molecules17067121] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 05/23/2012] [Accepted: 06/04/2012] [Indexed: 12/01/2022] Open
Abstract
The trans-selective catalytic asymmetric formation of β-lactones constitutes an attractive surrogate for anti-aldol additions. Recently, we have reported the first catalyst which is capable of forming trans-β-lactones with high enantioselectivity from aliphatic (and aromatic) aldehyde substrates by cyclocondensation with acyl bromides. In that previous study the concepts of Lewis acid and organic aprotic ion pair catalysis were combined in a salen-type catalyst molecule. Since a pyridinium residue on the salen periphery is essential for high trans- and enantioselectivity, we were interested in the question of whether substituents on the pyridinium rings could be used to further improve the catalyst efficiency, as they might have a significant impact on the effective charges within the heterocycles. In the present study we have thus compared a small library of aluminum salen/bispyridinium catalysts mainly differing in the substituents on the pyridinium residues. As one result of these studies a new catalyst was identified which offers slightly superior stereoselectivity as compared to the previously reported best catalyst. NBO calculations have revealed that the higher stereoselectivity can arguably not be explained by the variation of the effective charge.
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41
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Affiliation(s)
- D. W. Allen
- Biomedical Research Centre Sheffield Hallam University Sheffield, S1 1WB UK
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42
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Chen S, Salo EC, Wheeler KA, Kerrigan NJ. BINAPHANE-Catalyzed Asymmetric Synthesis of trans-β-Lactams from Disubstituted Ketenes and N-Tosyl Arylimines. Org Lett 2012; 14:1784-7. [DOI: 10.1021/ol3003783] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shi Chen
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States, and Department of Chemistry, Eastern Illinois University, 600 Lincoln Avenue, Charleston, Illinois 61920-3099, United States
| | - Eric C. Salo
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States, and Department of Chemistry, Eastern Illinois University, 600 Lincoln Avenue, Charleston, Illinois 61920-3099, United States
| | - Kraig A. Wheeler
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States, and Department of Chemistry, Eastern Illinois University, 600 Lincoln Avenue, Charleston, Illinois 61920-3099, United States
| | - Nessan J. Kerrigan
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States, and Department of Chemistry, Eastern Illinois University, 600 Lincoln Avenue, Charleston, Illinois 61920-3099, United States
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43
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Liu G, Shirley ME, Romo D. A Diastereoselective, Nucleophile-Promoted Aldol-Lactonization of Ketoacids Leading to Bicyclic-β-Lactones. J Org Chem 2012; 77:2496-500. [DOI: 10.1021/jo202252y] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gang Liu
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Morgan E. Shirley
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Daniel Romo
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
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44
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Zhao C, Mitchell TA, Vallakati R, Pérez LM, Romo D. Mechanistic Investigations of the ZnCl2-Mediated Tandem Mukaiyama Aldol Lactonization: Evidence for Asynchronous, Concerted Transition States and Discovery of 2-Oxopyridyl Ketene Acetal Variants. J Am Chem Soc 2012; 134:3084-94. [DOI: 10.1021/ja209163w] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Cunxiang Zhao
- Department of Chemistry and #Laboratory for Molecular Simulation, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
- Department
of Chemistry, Illinois State University, Campus Box
4160, Normal, Illinois 61790-4160, United States
| | - T. Andrew Mitchell
- Department of Chemistry and #Laboratory for Molecular Simulation, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
- Department
of Chemistry, Illinois State University, Campus Box
4160, Normal, Illinois 61790-4160, United States
| | - Ravikrishna Vallakati
- Department of Chemistry and #Laboratory for Molecular Simulation, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
- Department
of Chemistry, Illinois State University, Campus Box
4160, Normal, Illinois 61790-4160, United States
| | - Lisa M. Pérez
- Department of Chemistry and #Laboratory for Molecular Simulation, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
- Department
of Chemistry, Illinois State University, Campus Box
4160, Normal, Illinois 61790-4160, United States
| | - Daniel Romo
- Department of Chemistry and #Laboratory for Molecular Simulation, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
- Department
of Chemistry, Illinois State University, Campus Box
4160, Normal, Illinois 61790-4160, United States
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45
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Oe Y, Inoue T, Kishimoto H, Sasaki M, Ohta T, Furukawa I. Three-Component Coupling Catalyzed by Phosphine: Preparation of α-Amino γ-Oxo Acid Derivatives. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/ijoc.2012.22017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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46
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NHC-Catalyzed Enantioselective [2 + 2] and [2 + 2 + 2] Cycloadditions of Ketenes with Isothiocyanates. Org Lett 2011; 13:6382-5. [DOI: 10.1021/ol202688h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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47
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Shen LT, Shao PL, Ye S. N-Heterocyclic Carbene-Catalyzed Cyclization of Unsaturated Acyl Chlorides and Ketones. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100178] [Citation(s) in RCA: 162] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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48
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Koch FM, Peters R. Lewis Acid/Base Catalyzed [2+2]‐Cycloaddition of Sulfenes and Aldehydes: A Versatile Entry to Chiral Sulfonyl and Sulfinyl Derivatives. Chemistry 2011; 17:3679-92. [DOI: 10.1002/chem.201003542] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Indexed: 01/18/2023]
Affiliation(s)
- Florian M. Koch
- ETH Zürich, Laboratory of Organic Chemistry, Wolfgang‐Pauli‐Str. 10, 8093 Zürich (Switzerland)
| | - René Peters
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany), Fax: (+49) 711‐685‐54330
- ETH Zürich, Laboratory of Organic Chemistry, Wolfgang‐Pauli‐Str. 10, 8093 Zürich (Switzerland)
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49
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Wei PH, Ibrahim AA, Mondal M, Nalla D, Harzmann GD, Tedeschi FA, Wheeler KA, Kerrigan NJ. Mechanistic studies of the phosphine-catalyzed homodimerization of ketoketenes. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.10.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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50
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Ibrahim AA, Wei PH, Harzmann GD, Kerrigan NJ. Josiphos-Catalyzed Asymmetric Homodimerization of Ketoketenes. J Org Chem 2010; 75:7901-4. [DOI: 10.1021/jo101867m] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ahmad A. Ibrahim
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Pei-Hsun Wei
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Gero D. Harzmann
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
| | - Nessan J. Kerrigan
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, Michigan 48309-4477, United States
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