1
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Yang F, Wang L, Liang M, Zhang L, Fan B, Yao B. Pd-Catalyzed Asymmetric Allylation Reaction of 2-Aryl-3 H-indol-3-ones with Allyltrimethylsilane. J Org Chem 2024; 89:1873-1879. [PMID: 38241606 DOI: 10.1021/acs.joc.3c02599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2024]
Abstract
An efficient method for the first ene-reaction of 2-aryl-3H-indol-3-ones with allyltrimethylsilane has been developed for the first time. The reaction proceeded under the catalysis of Pd(OAc)2 and chiral phosphoric ligand L11 in the presence of Cu(CF3COO)2·XH2O, PivOH, and 5 Å molecular sieves in DMSO at 60 °C. The present methodology can avoid the impact of amine products generated by the reaction on the catalyst, and at the same time, the high catalytic activity of classical palladium catalysts still has catalytic ability for low electrophilic keto-imines. The desired products were furnished in excellent yields with good enantioselectivity.
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Affiliation(s)
- Fan Yang
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China
| | - Lun Wang
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Meiqi Liang
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Linchun Zhang
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Baomin Fan
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
- Department School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, People's Republic of China
| | - Bo Yao
- MOE Key Laboratory of Cluster Science, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China
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2
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Han J, Liu R, Lin Z, Zi W. Stereodivergent Construction of Csp 3 -Csp 3 Bonds Bearing Vicinal Stereocenters by Synergistic Palladium and Phase-Transfer Catalysis. Angew Chem Int Ed Engl 2023; 62:e202215714. [PMID: 36380525 DOI: 10.1002/anie.202215714] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Indexed: 11/18/2022]
Abstract
Synergistic catalysis has emerged as one of the most powerful tools for stereodivergent formation of Csp3 -Csp3 bonds bearing vicinal stereocenters. Despite the many successes that have been achieved in this field, stereodivergent Csp3 -Csp3 coupling reactions involving stabilized nucleophiles remain challenging because of the competing single-catalysis pathway. Herein, we report a synergistic palladium/phase-transfer catalyst system that enables diastereodivergent Csp3 -Csp3 coupling reactions of 1,3-dienes with stabilized nucleophile oxindoles. Both the syn and anti coupling products, bearing quaternary and tertiary vicinal stereocenters, could be selectively produced in good yields with high enantio- and diastereoselectivities. Non-covalent activation of the stabilized nucleophile via chiral ion pair in a biphasic system is a crucial success factor in achieving diastereodivergence.
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Affiliation(s)
- Jingqiang Han
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Rixin Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Zitong Lin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Weiwei Zi
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.,Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300071, China
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3
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Chen H, Peng J, Pang Q, Du H, Huang L, Gao L, Lan Y, Yang C, Song Z. Enantioselective Synthesis of Spirosilabicyclohexenes by Asymmetric Dual Ring Expansion of Spirosilabicyclobutane with Alkynes. Angew Chem Int Ed Engl 2022; 61:e202212889. [DOI: 10.1002/anie.202212889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Indexed: 11/19/2022]
Affiliation(s)
- Hua Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Ju Peng
- School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 China
| | - Qinjiao Pang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Huimin Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Liying Huang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Lu Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Yu Lan
- School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 China
- Green Catalysis Center, and College of Chemistry Zhengzhou University Zhengzhou Henan 450001 China
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology College of Chemistry Sichuan University Chengdu 610064 China
| | - Zhenlei Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
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4
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Chen Y, He J, Zhuang C, Liu Z, Xiao K, Su Z, Ren X, Wang T. Synergistic Catalysis between a Dipeptide Phosphonium Salt and a Metal‐Based Lewis Acid for Asymmetric Synthesis of
N
‐Bridged [3.2.1] Ring Systems. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education College of Chemistry Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Jiajia He
- Key Laboratory of Green Chemistry & Technology of Ministry of Education College of Chemistry Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Cheng Zhuang
- National Chengdu Center for Safety Evaluation of Drugs and National Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610041 P. R. China
| | - Zanjiao Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education College of Chemistry Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Kai Xiao
- National Chengdu Center for Safety Evaluation of Drugs and National Clinical Research Center for Geriatrics West China Hospital Sichuan University Chengdu 610041 P. R. China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology of Ministry of Education College of Chemistry Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Xiaoyu Ren
- Key Laboratory of Green Chemistry & Technology of Ministry of Education College of Chemistry Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Tianli Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education College of Chemistry Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
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5
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Chen Y, He J, Zhuang C, Liu Z, Xiao K, Su Z, Ren X, Wang T. Synergistic Catalysis between a Dipeptide Phosphonium Salt and a Metal-Based Lewis Acid for Asymmetric Synthesis of N-Bridged [3.2.1] Ring Systems. Angew Chem Int Ed Engl 2022; 61:e202207334. [PMID: 35766480 DOI: 10.1002/anie.202207334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Indexed: 02/05/2023]
Abstract
We present an unprecedented synergic catalytic route for the asymmetric construction of fluorinated N-bridged [3.2.1] cyclic members of tropane family via a bifunctional phosphonium salt/silver co-catalyzed cyclization process. A broad variety of substrates bearing an assortment of functional groups are compatible with this method, providing targeted compounds bearing seven-membered ring and four contiguous stereocenters in high yields with excellent stereoselectivities. The gram-scale preparations, facile elaborations and preliminary biological activities of the products demonstrate the application potential. Moreover, both experimental and computational mechanistic studies revealed that the cyclization proceeded via a "sandwich" reaction model with multiple weak-bond cooperative activations. Insights gained from our studies are expected to advance general efforts towards the catalytic synthesis of challenging chiral heterocyclic molecules.
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Affiliation(s)
- Yuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Jiajia He
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Cheng Zhuang
- National Chengdu Center for Safety Evaluation of Drugs and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, P. R. China
| | - Zanjiao Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Kai Xiao
- National Chengdu Center for Safety Evaluation of Drugs and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, P. R. China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Xiaoyu Ren
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Tianli Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
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6
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Muzart J. Allylic C(
sp
3
)−C(
sp
3
) Bond Formation Through Pd‐Catalyzed C(
sp
3
)−H Activation of Alkenes and 1,4‐Dienes. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Jacques Muzart
- Institut de Chimie Moléculaire de Reims, UMR 7312 CNRS – Université de Reims Champagne-Ardenne B.P. 1039 51687 Reims Cedex 2 France
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7
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Oiarbide M, Palomo C. Extended Enolates: Versatile Intermediates for Asymmetric C-H Functionalization via Noncovalent Catalysis. Chemistry 2021; 27:10226-10246. [PMID: 33961323 PMCID: PMC8361983 DOI: 10.1002/chem.202100756] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Indexed: 12/22/2022]
Abstract
Catalyst-controlled functionalization of unmodified carbonyl compounds is a relevant operation in organic synthesis, especially when high levels of site- and stereoselectivity can be attained. This objective is now within reach for some subsets of enolizable substrates using various types of activation mechanisms. Recent contributions to this area include enantioselective transformations that proceed via transiently generated noncovalent di(tri)enolate-catalyst coordination species. While relatively easier to form than simple enolate congeners, di(tri)enolates are ambifunctional in nature and so control of the reaction regioselectivity becomes an issue. This Minireview discusses in some detail this and other problems, and how noncovalent activation approaches based on metallic and metal free catalysts have been developed to advance the field.
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Affiliation(s)
- Mikel Oiarbide
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHUManuel Lardizabal 320018San SebastiánSpain
| | - Claudio Palomo
- Departamento de Química Orgánica IUniversidad del País Vasco UPV/EHUManuel Lardizabal 320018San SebastiánSpain
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8
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Wang T, Peng Y, Li G, Luo Y, Ye Y, Huo X, Zhang W. Synergistic Ir/Cu Catalysis for Asymmetric Allylic Alkylation of Oxindoles: Enantio- and Diastereoselective Construction of Quaternary and Tertiary Stereocenters. Chemistry 2021; 27:10255-10260. [PMID: 33982366 DOI: 10.1002/chem.202101267] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Indexed: 01/14/2023]
Abstract
3,3-Disubstituted oxindoles bearing quaternary and tertiary stereogenic centers are privileged structural motifs, which widely exist in pharmaceutical and natural products. Herein, a highly regio-, enantio-, and diastereoselective allylic alkylation of 3-alkyl oxindoles through synergistic iridium and copper catalysis is described, which provides a series of 3,3-disubstituted oxindole derivatives containing adjacent quaternary and tertiary stereogenic centers in excellent yields, enantiomeric excess, and diastereomeric ratio (for 30 examples, up to 97 % yield, >99 % ee, and >20 : 1 dr). This method provides exclusive branched selectivity, excellent enantio- and diastereoselectivities, and good functional compatibility. Control experiments suggested that the chiral copper catalyst is required for achieving high reactivities and diastereoselectivities under mild reaction conditions.
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Affiliation(s)
- Tianhong Wang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Youbin Peng
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Guanlin Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yicong Luo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yong Ye
- College of Chemistry, Zhengzhou University, 75 Daxue Road, Zhengzhou, 450052, China
| | - Xiaohong Huo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,College of Chemistry, Zhengzhou University, 75 Daxue Road, Zhengzhou, 450052, China
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9
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Li D, Zhang M, Yang Y, Peng T, Yang D, Gao W, Wang R. Desymmetrization Process by Mg(II)-Catalyzed Intramolecular Vinylogous Michael Reaction. Org Lett 2020; 22:9229-9233. [DOI: 10.1021/acs.orglett.0c03417] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Dan Li
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Minmin Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou 730000, China
| | - Yuling Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou 730000, China
| | - Tianyu Peng
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou 730000, China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou 730000, China
| | - Wei Gao
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou 730000, China
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10
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He Q, Yang Z, Yang J, Du W, Chen Y. Enantioselective Formal Arylation of (7‐Aza)isatylidene Malononitriles with α′‐Alkylidene‐2‐cyclohexenones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000900] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Qing He
- Department of Medicinal Chemistry West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Zhen‐Hong Yang
- Department of Medicinal Chemistry West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Jing Yang
- Department of Anesthesiology West China Hospital Sichuan University Chengdu 610041 People's Republic of China
| | - Wei Du
- Department of Medicinal Chemistry West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Ying‐Chun Chen
- Department of Medicinal Chemistry West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
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11
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Lázaro‐Milla C, Macicior J, Yanai H, Almendros P. Trifluorosulfonylation Cascade in Allenols: Stereocontrolled Synthesis of Bis(triflyl)enones. Chemistry 2020; 26:8983-8989. [PMID: 32369226 DOI: 10.1002/chem.202001236] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Carlos Lázaro‐Milla
- Grupo de Lactamas y Heterociclos BioactivosUnidad Asociada al CSIC, Departamento de Química OrgánicaFacultad de Ciencias QuímicasUniversidad Complutense de, Madrid 28040 Madrid Spain
| | - Jon Macicior
- Grupo de Lactamas y Heterociclos BioactivosUnidad Asociada al CSIC, Departamento de Química OrgánicaFacultad de Ciencias QuímicasUniversidad Complutense de, Madrid 28040 Madrid Spain
- Instituto de Química Orgánica General, IQOGConsejo Superior de Investigaciones Científicas, CSIC Juan de la Cierva 3 28006 Madrid Spain
| | - Hikaru Yanai
- School of PharmacyTokyo University of Pharmacy and Life Sciences 1432-1 Horinouchi Hachioji Tokyo 192-0392 Japan
| | - Pedro Almendros
- Instituto de Química Orgánica General, IQOGConsejo Superior de Investigaciones Científicas, CSIC Juan de la Cierva 3 28006 Madrid Spain
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12
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Zhang Q, Li Y, Wang J, Yang C, Liu C, Li X, Cheng J. B(C
6
F
5
)
3
/Chiral Phosphoric Acid Catalyzed Ketimine–Ene Reaction of 2‐Aryl‐3
H
‐indol‐3‐ones and α‐Methylstyrenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915226] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qing‐Xia Zhang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Yao Li
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Cheng‐Jun Liu
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Jin‐Pei Cheng
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
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13
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Zhang QX, Li Y, Wang J, Yang C, Liu CJ, Li X, Cheng JP. B(C 6 F 5 ) 3 /Chiral Phosphoric Acid Catalyzed Ketimine-Ene Reaction of 2-Aryl-3H-indol-3-ones and α-Methylstyrenes. Angew Chem Int Ed Engl 2020; 59:4550-4556. [PMID: 31943586 DOI: 10.1002/anie.201915226] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/30/2019] [Indexed: 11/05/2022]
Abstract
The enantioselective ketimine-ene reaction is one of the most challenging stereocontrolled reaction types in organic synthesis. In this work, catalytic enantioselective ketimine-ene reactions of 2-aryl-3H-indol-3-ones with α-methylstyrenes were achieved by utilizing a B(C6 F5 )3 /chiral phosphoric acid (CPA) catalyst. These ketimine-ene reactions proceed well with low catalyst loading (B(C6 F5 )3 /CPA=2 mol %/2 mol %) under mild conditions, providing rapid and facile access to a series of functionalized 2-allyl-indolin-3-ones with very good reactivity (up to 99 % yield) and excellent enantioselectivity (up to 99 % ee). Theoretical calculations reveal that enhancement of the acidity of the chiral phosphoric acid by B(C6 F5 )3 significantly reduces the activation free energy barrier. Furthermore, collective favorable hydrogen-bonding interactions, especially the enhanced N-H⋅⋅⋅O hydrogen-bonding interaction, differentiates the free energy of the transition states of CPA and B(C6 F5 )3 /CPA, thereby inducing the improvement of stereoselectivity.
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Affiliation(s)
- Qing-Xia Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Yao Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Cheng-Jun Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
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14
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Zhang CH, Huang R, Qing X, Lin J, Yan SJ. Cascade reaction of isatins with nitro-substituted enamines: highly selective synthesis of functionalized (Z)-3-(1-(arylamino)-2-oxoarylidene)indolin-2-ones. Chem Commun (Camb) 2020; 56:3488-3491. [DOI: 10.1039/d0cc00923g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel protocol for the construction of functionalized (Z)-3-(1(-arylamino)-2-oxoarylidene)indolin-2-ones (AOIDOs) from isatins 1 with nitro-substituted enamines 2via an unprecedented cascade reaction catalyzed by sulfamic acid is developed.
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Affiliation(s)
- Cong-Hai Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Rong Huang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Xia Qing
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Sheng-Jiao Yan
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
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