1
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Yu ZJ, Yan S, Zhao XL, Zhang J, Zhao MX. Chiral Brønsted Base Activation of Donor-Acceptor Cyclopropanes toward Diastereo- and Enantioselective [3 + 2] Cycloaddition with Isatin-Derived Ketimines. J Org Chem 2024; 89:8691-8705. [PMID: 38856011 DOI: 10.1021/acs.joc.4c00614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Organocatalyzed diastereo- and enantioselective [3 + 2] cycloaddition reactions of donor-acceptor (D-A) cyclopropanes with isatin-derived ketimines are presented. Different from well-developed Lewis acid activation protocols which promote the reactivity of D-A cyclopropanes through coordinating to the acceptor group, in this reaction, dicyanocyclopropylmethyl ketones can be activated through nucleophilic activation of the donor group by using dihydroquinine-derived squaramide as Brønsted base catalyst. The reaction affords functionalized spiro[oxindole-3,2'-pyrrolidines] with two nonadjacent tetra- and tri-substituted stereocenters in 83-99% yields, moderate to excellent diastereoselectivities (up to >20:1 diastereomeric ratio (dr)), and excellent enantioselectivities (up to >99% enantiomeric excess (ee)) under mild conditions.
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Affiliation(s)
- Zhe-Jia Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, China
| | - Shuang Yan
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, China
| | - Xiao-Li Zhao
- Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Jun Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, China
| | - Mei-Xin Zhao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, China
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2
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Cai Q, Yu T, Li J, Zhao Y, Hou J, Xue L, Yu S, Yao C, Li YM. Cu(II)-Catalyzed Enantioselective Aza-Friedel-Crafts Reaction of 1-Naphthols and Electron-Rich Phenols with Isatin-Derived Ketimines. Chemistry 2024; 30:e202304118. [PMID: 38433408 DOI: 10.1002/chem.202304118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 03/05/2024]
Abstract
New chiral ligands could be obtained by introducing proline moieties and imidazoline moieties to binaphthyl skeletons. The chiral ligands exhibited balanced rigidity and flexibility which could allow the change of the conformations during the reactions on one hand, and could provide sufficient asymmetric induction on the other. The proline moiety could act as a linker connecting the binaphthyl skeletons and the imidazoline moieties as well as a coordinating group for the central metal, and the electronic and steric properties of the imidazoline groups could be carefully fine-tuned by the use of different substituents. In the presence of Cu(II) catalyst bearing such chiral ligands, aza-Friedel-Crafts reaction of 1-naphthols and electron-rich phenols with isatin-derived ketimines provided the desired products with good to excellent yields and up to 99 % ee. The reactions showed good scalability, and excellent ee could still be obtained when the reaction was carried out in gram-scale.
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Affiliation(s)
- Qihang Cai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Tianxu Yu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Jiahui Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Yan Zhao
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Jiaqi Hou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Leipeng Xue
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Shibo Yu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Chao Yao
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
| | - Yue-Ming Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, China
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3
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Wang Y, Huang X, Ji H, Zhou H, Gao H, Xu J. Bifunctional Thiourea-Catalyzed Enantioselective Aza-Friedel-Crafts Reaction of 3-Aminobenzofurans with Isatin-Derived Ketimines. J Org Chem 2023; 88:15486-15493. [PMID: 37867301 DOI: 10.1021/acs.joc.3c01741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
A quinine-derived thiourea-promoted enantioselective aza-Friedel-Crafts reaction of 3-aminobenzofurans with isatin-derived ketimines is developed, providing a variety of 3-benzofuran-3-amino-2-oxindoles bearing a quaternary stereocenter with good to excellent yields (72-95%) and moderate to excellent enantioselectivities (48-97%). The synthetic potential of this concise and efficient protocol is revealed by gram-scale preparation and further transformation of the adduct to an optically pure spirocyclic oxindole.
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Affiliation(s)
- Yangyang Wang
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Xiaoming Huang
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Haojie Ji
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Hongwei Zhou
- College of Biological, Chemical Science and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, P. R. China
| | - Hongjie Gao
- Pharmaron (Ningbo) Technology Development Co., Ltd., No. 800 Bin-Hai fourth Road, Hangzhou Bay New Zone, Ningbo 315336, P. R. China
| | - Jianfeng Xu
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
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4
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Xue L, Hou J, Li J, Yu T, Cai Q, Yu S, Yao C, Li YM. Copper(II)-Catalyzed Enantioselective Aza-Friedel-Crafts Reaction of Indoles with Isatin-Derived N-Boc-Ketimines. J Org Chem 2023; 88:14345-14350. [PMID: 37791977 DOI: 10.1021/acs.joc.3c01144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
The copper(II)-catalyzed enantioselective aza-Friedel-Crafts reaction of indoles with isatin-derived N-Boc-ketimines was developed by using tunable chiral O-N-N tridentate ligands derived from BINOL and proline. In general, the reaction afforded chiral 3-indolyl-3-aminooxindoles under mild conditions in high yields (83-97%) with excellent ee (69-99%).
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Affiliation(s)
- Leipeng Xue
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Jiaqi Hou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Jiahui Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Tianxu Yu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Qihang Cai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Shibo Yu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Chao Yao
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Yue-Ming Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
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5
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Yoshida Y, Ao T, Mino T, Sakamoto M. Chiral Bromonium Salt (Hypervalent Bromine(III)) with N-Nitrosamine as a Halogen-Bonding Bifunctional Catalyst. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28010384. [PMID: 36615579 PMCID: PMC9822295 DOI: 10.3390/molecules28010384] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 01/04/2023]
Abstract
There has been a great focus on halogen-bonding as a unique interaction between electron-deficient halogen atoms with Lewis basic moieties. Although the application of halogen-bonded atoms in organic chemistry has been eagerly researched in these decades, the development of chiral molecules with halogen-bonding functionalities and their utilization in asymmetric catalysis are still in the\ir infancy. We have previously developed chiral halonium salts with amide functionalities, which behaved as excellent catalysts albeit in only two reactions due to the lack of substrate activation abilities. In this manuscript, we have developed chiral halonium salts with an N-nitrosamine moiety and applied them to the Mannich reaction of isatin-derived ketimines with malonic esters. The study focused on our novel bromonium salt catalyst which provided the corresponding products in high yields with up to 80% ee. DFT calculations of the chiral catalyst structure suggested that the high asymmetric induction abilities of this catalyst are due to the Lewis basic role of the N-nitrosamine part. To the best of our knowledge, this is the first catalytic application of N-nitrosamines.
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6
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Duan M, Chen J, Wang T, Luo S, Wang M, Fan B. Chiral Phosphoric Acid-Catalyzed Enantioselective Aza-Friedel-Crafts Addition of Naphthols with Isatin-Derived Ketimines. J Org Chem 2022; 87:15152-15158. [PMID: 36269152 DOI: 10.1021/acs.joc.2c01659] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The enantioselective Friedel-Crafts addition of naphthols with isatin-derived ketimines was developed with H8-BINOL-derived chiral biaryl phosphoric acid. A wide range of isatin-derived ketimines and naphthols were successfully applied and gave a series of chiral 3-amino-2-oxindoles in excellent yields with high optical purities.
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Affiliation(s)
- Mei Duan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources (Yunnan Minzu University), State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming650504, Yunnan, China
| | - Jingchao Chen
- Key Laboratory of Chemistry in Ethnic Medicinal Resources (Yunnan Minzu University), State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming650504, Yunnan, China
| | - Ting Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources (Yunnan Minzu University), State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming650504, Yunnan, China
| | - Shaojian Luo
- Key Laboratory of Chemistry in Ethnic Medicinal Resources (Yunnan Minzu University), State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming650504, Yunnan, China
| | - Meifen Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources (Yunnan Minzu University), State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming650504, Yunnan, China
| | - Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources (Yunnan Minzu University), State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming650504, Yunnan, China.,Department School of Chemistry and Environment, Yunnan Minzu University, Kunming650504, Yunnan, China
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7
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Filatov VE, Iuzabchuk DA, Tarasevich BN, Zyk NV, Beloglazkina EK. A convenient -diastereoselective synthesisof -isatin arylimines the aza-Wittig reaction. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Basu P, Satam N, Pati S, Suresh A, Namboothiri INN. Reactions of Sulfonylphthalide with Diverse Activated Imines for the Synthesis of Enaminophthalides, Spiro-isoquinolinones, and Homalicine Natural Products. J Org Chem 2022; 88:4038-4051. [PMID: 35797456 DOI: 10.1021/acs.joc.2c00816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity of the Hauser-Kraus (H-K) donor, 3-sulfonylphthalide, with various activated imines under basic conditions is demonstrated. The reaction of 3-sulfonylphthalide with Boc-protected aldimine provides a rapid access to 1,2-imine adducts and alkylidenephthalides depending upon the stoichiometry of the base. The alkylidenephthalides could be transformed to ketophthalides, a new class of phthalides, on acid hydrolysis, which upon reductive cyclization using Zn/AcOH afforded the natural product homalicine. On the contrary, the Boc-protected isatinimines undergo an efficient H-K annulation to provide spiro-isoquinolinone-oxindoles in excellent yields. However, the corresponding conjugated ketimines afforded Michael adducts, which were converted to the corresponding alkylidenephthalides under TBAF conditions.
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Affiliation(s)
- Pallabita Basu
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Nishikant Satam
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Soumyaranjan Pati
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
| | - Alati Suresh
- Indian Institute of Technology Bombay, Mumbai 400 076, Maharashtra, India
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9
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Chen IT, Guan RY, Han JL. Asymmetric Sequential Vinylogous Mannich/annulation/acylation Process of 2‐Ethylidene 1,3‐indandiones and Isatin N‐Boc ketimines: Access to Chiral Spiro‐oxindole Piperidine Derivatives. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Li J, Wei Z, Cao J, Liang D, Lin Y, Duan H. Aymmetric Aza-Friedel-Crafts Reaction of Isatin-Derived Ketimines with Indoles Catalyzed by a Chiral Phase-Transfer Catalyst. J Org Chem 2022; 87:2532-2542. [PMID: 35084194 DOI: 10.1021/acs.joc.1c02477] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A highly enantioselective aza-Friedel-Crafts reaction of 1H-indoles with isatin-derived N-Cbz-ketimines catalyzed by quinine-derived phase-transfer catalysts was developed. A series of chiral 3-aminobisindole compounds containing a tetrasubstituted stereocenter were constructed by this protocol in high yields (82-91%) and moderate to excellent enantioselectivities (46-94% ee).
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Affiliation(s)
- Jing Li
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Zhonglin Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Jungang Cao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Dapeng Liang
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Yingjie Lin
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Haifeng Duan
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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11
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Kaur J, Preet Kaur B, Islam N, Chauhan P, Singh Chimni S. Stereoselective Mannich Reaction of
α
‐Acetoxy‐
β
‐keto Esters with Isatin Imine: An Efficient Access to Vicinal Tetra‐Substituted Stereocenters. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jasneet Kaur
- Department of Chemistry Khalsa College Amritsar 143001 India
| | - Banni Preet Kaur
- Department of Chemistry, U.G.C. Centre of Advance Studies in Chemistry Guru Nanak Dev University Amritsar 143005 India
| | - Nasarul Islam
- Department of Chemistry, Govt. Degree College Bandipora 193502 India
| | - Pankaj Chauhan
- Department of Chemistry Indian Institute of Technology Jammu, Jagti PO Nagrota, NH-44 Jammu 181 221 India
| | - Swapandeep Singh Chimni
- Department of Chemistry, U.G.C. Centre of Advance Studies in Chemistry Guru Nanak Dev University Amritsar 143005 India
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12
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Homma C, Takeshima A, Kano T, Maruoka K. Construction of chiral α- tert-amine scaffolds via amine-catalyzed asymmetric Mannich reactions of alkyl-substituted ketimines. Chem Sci 2020; 12:1445-1450. [PMID: 34163907 PMCID: PMC8179053 DOI: 10.1039/d0sc05269h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Stereoselective Mannich reactions of aldehydes with ketimines provide chiral β-amino aldehydes that bear an α-tert-amine moiety. However, the structural variation of the ketimines is limited due to the formation of inseparable E/Z isomers, low reactivity, and other synthetic difficulties. In this study, a highly diastereodivergent synthesis of hitherto difficult-to-access β-amino aldehydes that bear a chiral α-tert-amine moiety was achieved using the amine-catalyzed Mannich reactions of aldehydes with less-activated Z-ketimines that bear both alkyl and alkynyl groups.
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Affiliation(s)
- Chihiro Homma
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo Kyoto 606-8502 Japan
| | - Aika Takeshima
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo Kyoto 606-8502 Japan
| | - Taichi Kano
- Department of Chemistry, Graduate School of Science, Kyoto University Sakyo Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Graduate School of Science, Graduate School of Pharmaceutical Sciences, Kyoto University Kyoto 606-8502 Japan .,School of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 China
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13
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Affiliation(s)
- Xi‐Qiang Hou
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Da‐Ming Du
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
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14
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Song XJ, Ren HX, Xiang M, Li CY, Zou Y, Li X, Huang ZC, Tian F, Wang LX. Organocatalytic Enantioselective Michael Addition between 3-(3-hydroxy-1 H-pyrazol-1-yl)Oxindole and β -Nitrostyrene for the Preparation of Chiral Disubstituted Oxindoles. J Org Chem 2020; 85:9290-9300. [PMID: 32583669 DOI: 10.1021/acs.joc.9b03337] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A new enantioselective Michael addition between 3-(3-hydroxy-1H-pyrazol-1-yl)oxindole, a new synthon generated from isatin N,N'-cyclic azomethine imine 1,3-dipole, and β-nitrostyrene has been disclosed. A series of chiral 3-(3-oxo-2,3-dihydro-1H-pyrazol-1-yl) disubstituted oxindoles were obtained in excellent results (up to 97% yield, up to 94% ee) with moderate to good diastereoselectivities (up to 4.3:1 dr).
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Affiliation(s)
- Xiang-Jia Song
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Hong-Xia Ren
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Min Xiang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Chen-Yi Li
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Ying Zou
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Xia Li
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Zhi-Cheng Huang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100039, P.R. China
| | - Fang Tian
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China
| | - Li-Xin Wang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P.R. China
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15
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Rodríguez‐Rodríguez M, Maestro A, Andrés JM, Pedrosa R. Supported Bifunctional Chiral Thioureas as Catalysts in the Synthesis of 3‐Amino‐2‐Oxindoles through Enantioselective aza‐Friedel‐Crafts Reaction: Application in Continuous Flow Processes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000238] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Marta Rodríguez‐Rodríguez
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo Belén 7 47011- Valladolid Spain
| | - Alicia Maestro
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo Belén 7 47011- Valladolid Spain
| | - José M. Andrés
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo Belén 7 47011- Valladolid Spain
| | - Rafael Pedrosa
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo Belén 7 47011- Valladolid Spain
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16
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Li Z, Peng J, He C, Xu J, Ren H. Squaramide-Catalyzed Asymmetric Mannich Reactions of Azlactones with Isatin-Derived Ketimines: Access to α,β-Diamino Acid Derivatives Bearing Vicinal Quaternary Stereocenters. J Org Chem 2020; 85:3894-3901. [DOI: 10.1021/acs.joc.9b03000] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zhanhuan Li
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Jingyi Peng
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Chonglong He
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Jianfeng Xu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Hongjun Ren
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
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17
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Martín L, Maestro A, Andrés JM, Pedrosa R. Bifunctional thiourea-modified polymers of intrinsic microporosity for enantioselective α-amination of 3-aryl-2-oxindoles in batch and flow conditions. Org Biomol Chem 2020; 18:9275-9283. [DOI: 10.1039/d0ob01373k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A multigram scale preparation of enantioenriched 3-aryl-3-amino-2-oxindoles promoted by a novel chiral bifunctional thiourea, readily prepared from polymers of intrinsic microporosity.
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Affiliation(s)
- Laura Martín
- Instituto CINQUIMA and Departamento de Química Orgánica
- Facultad de Ciencias. Universidad de Valladolid. Paseo de Belén 7
- Valladolid
- Spain
| | - Alicia Maestro
- Instituto CINQUIMA and Departamento de Química Orgánica
- Facultad de Ciencias. Universidad de Valladolid. Paseo de Belén 7
- Valladolid
- Spain
| | - José M. Andrés
- Instituto CINQUIMA and Departamento de Química Orgánica
- Facultad de Ciencias. Universidad de Valladolid. Paseo de Belén 7
- Valladolid
- Spain
| | - Rafael Pedrosa
- Instituto CINQUIMA and Departamento de Química Orgánica
- Facultad de Ciencias. Universidad de Valladolid. Paseo de Belén 7
- Valladolid
- Spain
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18
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Karahan S, Tanyeli C. Bifunctional squaramide catalyzed stereoselective Mannich reaction of α-azido ketones with isatin-derived ketimines. Org Biomol Chem 2020; 18:479-487. [DOI: 10.1039/c9ob02208b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Bifunctional squaramide catalyzed asymmetric Mannich reaction of alpha-azido ketones and isatin derived ketiminines were established for the first time with high stereoselectivity. Adducts are valuable synthons for optically active heterocycles.
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Affiliation(s)
- Seda Karahan
- Department of Chemistry
- Middle East Technical University
- Ankara
- Turkey
| | - Cihangir Tanyeli
- Department of Chemistry
- Middle East Technical University
- Ankara
- Turkey
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19
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Niu L, Pi R, Dong S, Liu S. Aromatic C–H Bond Functionalized via Zwitterion Intermediates to Construct Bioxindole Containing Continuous Quaternary Carbons. J Org Chem 2019; 84:15192-15200. [DOI: 10.1021/acs.joc.9b02228] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Li Niu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Chemical Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Rou Pi
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Chemical Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Suzhen Dong
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Chemical Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Shunying Liu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Chemical Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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20
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Arai T, Araseki K, Kakino J. Catalytic Asymmetric Aza-Friedel–Crafts-Type Reaction of Indoles with Isatin-Derived N-Cbz-Ketimines Using a Chiral Bis(Imidazolidine)-Containing NCN-Pincer Palladium Catalyst. Org Lett 2019; 21:8572-8576. [DOI: 10.1021/acs.orglett.9b03148] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Takayoshi Arai
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Kensuke Araseki
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Junki Kakino
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Research Innovation Center (CIRIC), and Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
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21
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Fan Y, Lu J, Sha F, Li Q, Wu XY. Cu(I)-Catalyzed Asymmetric Mannich Reaction of Glycine Schiff Bases to Ketimines. J Org Chem 2019; 84:11639-11648. [PMID: 31449410 DOI: 10.1021/acs.joc.9b01566] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A copper-catalyzed asymmetric Mannich reaction between glycine Schiff bases and ketimines has been developed. This method afforded 2-oxindole-based chiral syn-α,β-diamino acid derivatives in high yields (89-99%) with good to excellent diastereoselectivities (≤98:2 dr) and excellent enantioselectivities (95-99% ee).
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Affiliation(s)
- Ying Fan
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , P. R. China
| | - Jian Lu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , P. R. China
| | - Feng Sha
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , P. R. China
| | - Qiong Li
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , P. R. China
| | - Xin-Yan Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , P. R. China
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22
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Liu Y, Wang J, Wei Z, Cao J, Liang D, Lin Y, Duan H. Highly Enantioselective Synthesis of Acyclic N,N′-Acetals by Chiral Urea Derived from Quinine Catalyzed the Addition of Aryl Amines to Isatin-Derived Ketimines. Org Lett 2019; 21:5719-5724. [DOI: 10.1021/acs.orglett.9b02098] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yuxin Liu
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Jingdong Wang
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Zhonglin Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Jungang Cao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Dapeng Liang
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Yingjie Lin
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Haifeng Duan
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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23
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Rodríguez‐Ferrer P, Sanz‐Novo M, Maestro A, Andrés JM, Pedrosa R. Synthesis of Enantioenriched 3‐Amino‐3‐Substituted Oxindoles by Stereoselective Mannich Reaction Catalyzed by Supported Bifunctional Thioureas. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900414] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Patricia Rodríguez‐Ferrer
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo de Belén 7 47011-Valladolid Spain
| | - Miguel Sanz‐Novo
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo de Belén 7 47011-Valladolid Spain
| | - Alicia Maestro
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo de Belén 7 47011-Valladolid Spain
| | - José M. Andrés
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo de Belén 7 47011-Valladolid Spain
| | - Rafael Pedrosa
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de CienciasUniversidad de Valladolid Paseo de Belén 7 47011-Valladolid Spain
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24
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L-tert-Leucine derived urea-ammonium salts: Efficient bifunctional phase transfer catalysts for highly diastereo- and enantioselective aza-Henry reaction of isatin-derived N-Boc ketimines with α-aryl nitromethanes. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Tong P, Li Y, Zhang Y, Jiang X. Triphenylphosphine‐Catalyzed Diastereoselective Addition of Oxazolones to Isatin‐Derived Ketimines: Construction of Vicinal N‐Substituted Quaternary Stereocenters. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900107] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pei Tong
- State Key Laboratory of Applied Organic ChemistryCollege of Chemistry and Chemical EngineeringLanzhou University Lanzhou 730000 P. R. China
| | - Ying Li
- State Key Laboratory of Applied Organic ChemistryCollege of Chemistry and Chemical EngineeringLanzhou University Lanzhou 730000 P. R. China
| | - Yuan Zhang
- State Key Laboratory of Applied Organic ChemistryCollege of Chemistry and Chemical EngineeringLanzhou University Lanzhou 730000 P. R. China
| | - Xianxing Jiang
- School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 P. R. China
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26
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Ravi Kumar G, Ramesh B, Yarlagadda S, Sridhar B, Reddy BVS. Organocatalytic Enantioselective Mannich Reaction: Direct Access to Chiral β-Amino Esters. ACS OMEGA 2019; 4:2168-2177. [PMID: 31459463 PMCID: PMC6648529 DOI: 10.1021/acsomega.8b02132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 01/11/2019] [Indexed: 06/10/2023]
Abstract
An asymmetric Mannich reaction has been developed to generate chiral β-amino esters in good yields with excellent enantiomeric excesses (ee, up to 99%) using a chiral bifunctional thiourea catalyst derived from (R,R)-cyclohexyldiamine. This is the first report on the addition of 3-indolinone-2-carboxylates to N-Boc-benzaldimines generated in situ from α-amidosulfones, which proceeds under mild conditions.
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Affiliation(s)
- G. Ravi Kumar
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Boora Ramesh
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Suresh Yarlagadda
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Balasubramanian Sridhar
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - B. V. Subba Reddy
- Fluoro & Agrochemicals and Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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27
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You Y, Lu WY, Xie KX, Zhao JQ, Wang ZH, Yuan WC. Enantioselective synthesis of isoquinoline-1,3(2H,4H)-dione derivatives via a chiral phosphoric acid catalyzed aza-Friedel-Crafts reaction. Chem Commun (Camb) 2019; 55:8478-8481. [PMID: 31268101 DOI: 10.1039/c9cc04057a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A highly enantioselective aza-Friedel-Crafts reaction of structurally new ketimines with indoles and pyrrole is developed by using a chiral phosphoric acid as the catalyst. This protocol enables the first enantioselective synthesis of isoquinoline-1,3(2H,4H)-dione derivatives in good to excellent yields (up to 99% yield) and excellent enantioselectivities (up to >99% ee).
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Affiliation(s)
- Yong You
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China.
| | - Wen-Ya Lu
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China.
| | - Ke-Xin Xie
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Jian-Qiang Zhao
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China.
| | - Zhen-Hua Wang
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China.
| | - Wei-Cheng Yuan
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China. and National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China.
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28
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Franc M, Urban M, Císařová I, Veselý J. Highly enantioselective addition of sulfur-containing heterocycles to isatin-derived ketimines. Org Biomol Chem 2019; 17:7309-7314. [DOI: 10.1039/c9ob01338e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In this study, we report a highly stereoselective addition of sulfur-containing heterocyclic compounds to isatin-derived ketimines efficiently catalyzed by cinchonidine-derived bifunctional tertiary aminothiourea (1 mol%).
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Affiliation(s)
- Michael Franc
- Department of Organic Chemistry
- Charles University
- 12843 Prague
- Czech Republic
| | - Michal Urban
- Department of Organic Chemistry
- Charles University
- 12843 Prague
- Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry
- Charles University
- 12843 Prague
- Czech Republic
| | - Jan Veselý
- Department of Organic Chemistry
- Charles University
- 12843 Prague
- Czech Republic
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29
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Liu Y, Wang J, Wei Z, Cao J, Liang D, Lin Y, Duan H. Direct enantio- and diastereoselective Mannich reactions of isatin-derived ketimines with oxo-indanecarboxylates catalyzed by chiral thiourea derived from hydroquinidine. Org Biomol Chem 2018; 16:8927-8932. [PMID: 30431642 DOI: 10.1039/c8ob02595a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A highly diastereo- and enantioselective Mannich reaction of isatin-derived ketimines with oxo-indanecarboxylates catalyzed by chiral thiourea derived from hydroquinidine has been developed. A series of 3-substituted 3-amino-oxindoles containing assembled bicyclic rings linked by a C-C bond were constructed by this protocol in excellent yields (92-99%) with high enantioselectivities (85-99% ee) and diastereoselectivities (up to >99 : 1 dr).
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Affiliation(s)
- Yuxin Liu
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
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30
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Xia X, Zhu Q, Wang J, Chen J, Cao W, Zhu B, Wu X. Direct Asymmetric Vinylogous Mannich Addition of 3,5-Disubstituted-4-nitroisoxazoles to Isatin-Derived Imines Catalyzed by a Bifunctional Phase-Transfer-Catalyst. J Org Chem 2018; 83:14617-14625. [PMID: 30411890 DOI: 10.1021/acs.joc.8b02439] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Asymmetric Mannich-type addition of 3,5-disubstituted-4-nitroisoxazoles to isatin-derived Boc-protected imines has been realized by using 0.01 equiv of amide phosphonium salt as a phase transfer catalyst. Our current methodology allows for the formation of 3-isoxazolylmethyl-substituted 3-aminooxindoles in excellent yields with good to excellent enantioselectivities. The practical value of this methodology was exemplified by a gram-scale synthesis of 5an, a key intermediate for the formal synthesis (+)-AG-041R.
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Affiliation(s)
- Xuejian Xia
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences , Shanghai University , 99 Shangda Lu , Shanghai 200444 , China
| | - Qiongqiong Zhu
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences , Shanghai University , 99 Shangda Lu , Shanghai 200444 , China
| | - Jing Wang
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences , Shanghai University , 99 Shangda Lu , Shanghai 200444 , China
| | - Jie Chen
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences , Shanghai University , 99 Shangda Lu , Shanghai 200444 , China
| | - Weiguo Cao
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences , Shanghai University , 99 Shangda Lu , Shanghai 200444 , China
| | - Bo Zhu
- School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang 453007 , China
| | - Xiaoyu Wu
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences , Shanghai University , 99 Shangda Lu , Shanghai 200444 , China
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31
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Guo W, Li L, Ding Q, Lin X, Liu X, Wang K, Liu Y, Fan H, Li C. Synthesis of Chiral Trispirocyclic Oxindoles via Organic-Base/Au(I)-Catalyzed Sequential Reactions. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02157] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Wengang Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Lu Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Qian Ding
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Xiangfeng Lin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Xianghui Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Kai Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Yan Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Hongjun Fan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
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32
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Brandão P, Burke AJ. Recent advances in the asymmetric catalytic synthesis of chiral 3-hydroxy and 3-aminooxindoles and derivatives: Medicinally relevant compounds. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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33
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Sivamuthuraman K, Kesavan V. Stereodivergent Synthesis of 3-Aminooxindole Derivatives Containing Vicinal Tetrasubstituted Stereocenters via the Mannich Reaction. J Org Chem 2018; 83:8936-8952. [PMID: 29966425 DOI: 10.1021/acs.joc.8b01020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A highly enantioselective stereodivergent synthesis of 3-aminooxindole derivatives was accomplished via asymmetric Mannich reaction between 2-substituted benzofuran-3-one and isatin-derived ketimines. Both anti and syn-selective chiral 3,3-disubstituted amino oxindoles bearing two adjacent tetrasubstituted stereogenic centers with high yield and excellent enantioselectivities were obtained using readily available cinchona-alkaloid derived organocatalysts. The control experiment revealed that oxygen atom present in the benzofuran ring played an important role in switching diastereodivergence. The obtained Mannich product was further transformed into a biologically important 2,3-dihydrobenzofuran derivative having three contiguous stereocenters with no loss of enantioselectivity.
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Affiliation(s)
- Koilpitchai Sivamuthuraman
- Chemical Biology Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences , Indian Institute of Technology Madras , Chennai 600036 , India
| | - Venkitasamy Kesavan
- Chemical Biology Laboratory, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences , Indian Institute of Technology Madras , Chennai 600036 , India
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34
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Sawa M, Miyazaki S, Yonesaki R, Morimoto H, Ohshima T. Catalytic Enantioselective Decarboxylative Mannich-Type Reaction of N-Unprotected Isatin-Derived Ketimines. Org Lett 2018; 20:5393-5397. [DOI: 10.1021/acs.orglett.8b02306] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Masanao Sawa
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi,
Higashi-ku, Fukuoka 812-8582, Japan
| | - Shotaro Miyazaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi,
Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryohei Yonesaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi,
Higashi-ku, Fukuoka 812-8582, Japan
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi,
Higashi-ku, Fukuoka 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi,
Higashi-ku, Fukuoka 812-8582, Japan
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35
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Kumari A, Kaur J, Bhardwaj VK, Chimni SS. Organocatalytic Asymmetric Decarboxylative Addition of β-Ketoacids to Methyleneindolinones Derivatives. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800454] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anita Kumari
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; 143005 Amritsar India
| | - Jasneet Kaur
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; 143005 Amritsar India
| | - Vimal K. Bhardwaj
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road 140001 Rupnagar India
| | - Swapandeep Singh Chimni
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; 143005 Amritsar India
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36
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Huang Q, Zhang L, Cheng Y, Li P, Li W. Enantioselective Construction of Vicinal Sulfur-containing Tetrasubstituted Stereocenters via Organocatalyzed Mannich-Type Addition of Rhodanines to Isatin Imines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800642] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Qiuhong Huang
- Department of Medicinal Chemistry, School of Pharmacy; Qingdao University, Qingdao; Shandong People's Republic of China 266021
| | - Lili Zhang
- Department of Medicinal Chemistry, School of Pharmacy; Qingdao University, Qingdao; Shandong People's Republic of China 266021
| | - Yuyu Cheng
- Department of Chemistry, Southern; University of Science and Technology, Shenzhen; Guangdong People's Republic of China 518055
| | - Pengfei Li
- Department of Chemistry, Southern; University of Science and Technology, Shenzhen; Guangdong People's Republic of China 518055
| | - Wenjun Li
- Department of Medicinal Chemistry, School of Pharmacy; Qingdao University, Qingdao; Shandong People's Republic of China 266021
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37
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Urban M, Franc M, Hofmanová M, Císařová I, Veselý J. The enantioselective addition of 1-fluoro-1-nitro(phenylsulfonyl)methane to isatin-derived ketimines. Org Biomol Chem 2018; 15:9071-9076. [PMID: 29083001 DOI: 10.1039/c7ob02408h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
An asymmetric organocatalytic addition of fluorinated phenylsulfonylnitromethane to isatin-derived ketimines was developed. The reaction was efficiently catalyzed by a chiral tertiary amine, cinchonine. This methodology provides a new type of optically active compound with two adjacent quaternary carbon stereocenters in good yield (up to 96%), with moderate diastereoselectivity (up to 5.7 : 1 dr) and excellent enantioselectivity (up to 98/96% ee).
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Affiliation(s)
- M Urban
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
| | - M Franc
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
| | - M Hofmanová
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
| | - I Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic
| | - J Veselý
- Department of Organic Chemistry, Charles University, Hlavova 8, 12843 Prague, Czech Republic.
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38
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A diastereoselective Mannich reaction of α-fluoroketones with ketimines: Construction of β-fluoroamine motifs with vicinal tetrasubstituted stereocenters. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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39
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Yarlagadda S, Sridhar B, Subba Reddy BV. Oxidative Asymmetric Aza-Friedel-Crafts Alkylation of Indoles with 3-Indolinone-2-carboxylates Catalyzed by a BINOL Phosphoric Acid and Promoted by DDQ. Chem Asian J 2018; 13:1327-1334. [PMID: 29575703 DOI: 10.1002/asia.201800300] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Indexed: 12/11/2022]
Abstract
An asymmetric aza-Friedel-Crafts alkylation reaction between indoles and indolenines that were derived in situ from 3-indolinone-2-carboxylates has been developed by using 3,3'-bis(triphenylsilyl)-1,1'-binaphthyl-2,2'-diyl hydrogen phosphate as a catalyst. The reaction proceeded under mild conditions and provided chiral indol-3-yl-3-indolinone-2-carboxylate derivatives in good yields with excellent ee values (up to 98.6 %). Similarly, the Mannich-type addition of indoline-3-ones to indolenines provided heterodimers with vicinal chiral quaternary centers. This method was successfully applied to the construction of the core structure of trigonoliimine C.
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Affiliation(s)
- Suresh Yarlagadda
- Centre for Semiochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India
| | - B Sridhar
- Laboratory of X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India
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40
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İşibol D, Karahan S, Tanyeli C. Asymmetric organocatalytic direct Mannich reaction of acetylacetone and isatin derived ketimines: Low catalyst loading in chiral cinchona-squaramides. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.081] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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41
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Ričko S, Meden A, Ciber L, Štefane B, Požgan F, Svete J, Grošelj U. Construction of Vicinal Tetrasubstituted Stereogenic Centersviaa Mannich-Type Organocatalyzed Addition of Δ2-Pyrrolin-4-ones to Isatin Imines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701384] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sebastijan Ričko
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Anže Meden
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Luka Ciber
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Franc Požgan
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
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42
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Huang Q, Cheng Y, Yuan H, Chang X, Li P, Li W. Organocatalytic enantioselective Mannich-type addition of 5H-thiazol-4-ones to isatin-derived imines: access to 3-substituted 3-amino-2-oxindoles featured by vicinal sulfur-containing tetrasubstituted stereocenters. Org Chem Front 2018. [DOI: 10.1039/c8qo00814k] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
3-Substituted 3-amino-2-oxindoles featuring both 5H-thiazol-4-one and vicinal sulfur-containing tetrasubstituted stereocenter structural motifs were obtained in high yields with excellent enantioselectivities and diastereoselectivities.
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Affiliation(s)
- Qiuhong Huang
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Yuyu Cheng
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- China
| | - Huijun Yuan
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
| | - Xiaoyong Chang
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- China
| | - Pengfei Li
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- China
| | - Wenjun Li
- Department of Medicinal Chemistry
- School of Pharmacy
- Qingdao University
- Qingdao
- China
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43
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44
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Sawa M, Morisaki K, Kondo Y, Morimoto H, Ohshima T. Direct Access to N-Unprotected α- and/or β-Tetrasubstituted Amino Acid Esters via Direct Catalytic Mannich-Type Reactions Using N-Unprotected Trifluoromethyl Ketimines. Chemistry 2017; 23:17022-17028. [PMID: 28950035 DOI: 10.1002/chem.201703516] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 11/08/2022]
Abstract
Direct catalytic C-C bond-forming addition to N-unprotected ketimines is an efficient and straightforward method of synthesizing N-unprotected tetrasubstituted amines that eliminates prior protection/deprotection steps and allows facile transformation of the products. Despite its advantages, however, N-unprotected ketimines have difficulties in C-C bond-forming reactions, and only a limited number of reactions and substrates are reported compared with their N-protected counterparts. Herein we report that N-unprotected trifluoromethyl ketimines are effective for C-C bond-forming reactions using Mannich-type reactions as a model case. We demonstrate that Lewis acid catalysis was effective for promoting reactions with various N-unprotected trifluoromethyl ketimines, and thiourea organocatalysis was effective for promoting highly enantioselective reactions with various carbonyl nucleophiles, providing direct access to various N-unprotected α- and/or β-tetrasubstituted amino acid esters. Furthermore, direct construction of vicinal tetrasubstituted chiral carbon stereocenters was achieved for the first time in a highly enantio- and diastereoselective manner. These results demonstrate the potential of N-unprotected ketimines as substrates applicable to many other addition reactions.
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Affiliation(s)
- Masanao Sawa
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kazuhiro Morisaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yuta Kondo
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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45
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Hajra S, Jana B. Quinine-Based Trifunctional Organocatalyst for Tandem Aza-Henry Reaction-Cyclization: Asymmetric Synthesis of Spiroxindole-Pyrrolidine/Piperidines. Org Lett 2017; 19:4778-4781. [PMID: 28849657 DOI: 10.1021/acs.orglett.7b02150] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A quinine-derived trifunctional sulphonamide catalyst has been developed for the effective asymmetric organocatalytic tandem aza-Henry reaction-cyclization of isatin-derived ketimines and nitroalkane-mesylates for the synthesis of spiro-pyrrolidine/piperidine-oxindoles. Demethylation of traditional bifunctional catalyst to incorporate an additional hydrogen bonding C6'-OH group plays the key role toward remarkable enantioselectivity.
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Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research (CBMR), Sanjay Gandhi Postgraduate Institute of Medical Sciences Campus , Raebareli Road, Lucknow 226014, UP, India
| | - Bibekananda Jana
- Centre of Biomedical Research (CBMR), Sanjay Gandhi Postgraduate Institute of Medical Sciences Campus , Raebareli Road, Lucknow 226014, UP, India.,Department of Chemistry, Indian Institute of Technology Kharagpur (IIT Kharagpur) , Kharagpur 721302, WB, India
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46
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Lin H, Zhou Z, Cai J, Han B, Gong L, Meggers E. Asymmetric Construction of 3,3-Disubstituted Oxindoles Bearing Vicinal Quaternary–Tertiary Carbon Stereocenters Catalyzed by a Chiral-at-Rhodium Complex. J Org Chem 2017; 82:6457-6467. [DOI: 10.1021/acs.joc.7b00793] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Huihua Lin
- Key
Laboratory for Chemical Biology of Fujian Province and Department
of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Zijun Zhou
- Key
Laboratory for Chemical Biology of Fujian Province and Department
of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Jun Cai
- Key
Laboratory for Chemical Biology of Fujian Province and Department
of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Bowen Han
- Key
Laboratory for Chemical Biology of Fujian Province and Department
of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Lei Gong
- Key
Laboratory for Chemical Biology of Fujian Province and Department
of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Eric Meggers
- Key
Laboratory for Chemical Biology of Fujian Province and Department
of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
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47
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Kaur J, Kumari A, Bhardwaj VK, Chimni SS. Chiral Squaramide-Catalyzed Enantioselective Decarboxylative Addition of β-Keto Acids to Isatin Imines. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700011] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jasneet Kaur
- Department of Chemistry, U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; Amritsar 143005 India
| | - Anita Kumari
- Department of Chemistry, U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; Amritsar 143005 India
| | - Vimal K. Bhardwaj
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road Rupnagar 140001 India
| | - Swapandeep Singh Chimni
- Department of Chemistry, U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; Amritsar 143005 India
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48
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Wang CM, Xia PJ, Xiao JA, Li J, Xiang HY, Chen XQ, Yang H. Photoredox-Catalyzed Reductive Dimerization of Isatins and Isatin-Derived Ketimines: Diastereoselective Construction of 3,3′-Disubstituted Bisoxindoles. J Org Chem 2017; 82:3895-3900. [DOI: 10.1021/acs.joc.6b03056] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chao-Ming Wang
- College of Chemistry and
Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Peng-Ju Xia
- College of Chemistry and
Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Jun-An Xiao
- College of Chemistry and
Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Jun Li
- College of Chemistry and
Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Hao-Yue Xiang
- College of Chemistry and
Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Xiao-Qing Chen
- College of Chemistry and
Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Hua Yang
- College of Chemistry and
Chemical Engineering, Central South University, Changsha 410083, P. R. China
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49
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Kwon Y, Rhee YH, Park J. Chemoselective, Isomerization-Free Synthesis of N
-Acylketimines from N-H Imines. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601406] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yearang Kwon
- Department of Chemistry; POSTECH (Pohang University of Science and Technology); Pohang 37673 Korea
| | - Young Ho Rhee
- Department of Chemistry; POSTECH (Pohang University of Science and Technology); Pohang 37673 Korea
| | - Jaiwook Park
- Department of Chemistry; POSTECH (Pohang University of Science and Technology); Pohang 37673 Korea
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50
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Choudhary MK, Menapara T, Tak R, Kureshy RI, Khan NUH. Asymmetric Synthesis of 3-Amino Oxindoles Using Isatin-DerivedN-Boc Ketimines with Activated Nitroolefin Catalyzed by Organocatalysts. ChemistrySelect 2017. [DOI: 10.1002/slct.201700032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Manoj K. Choudhary
- Division of Inorganic Material and Catalysis; Central Salt and Marine Chemical Research Institute (CSMCRI); Bhavngar- 364002, Gujrat India
- Academy of Scientific and Innovative Research (AcSIR); Central Salt and Marine Chemical Research Institute (CSMCRI); Council of Scientific and Industial Research (CSIR); G.B. Marg Bhavnagar- 364002, Gujrat India
| | - Tusharkumar Menapara
- Division of Inorganic Material and Catalysis; Central Salt and Marine Chemical Research Institute (CSMCRI); Bhavngar- 364002, Gujrat India
- Academy of Scientific and Innovative Research (AcSIR); Central Salt and Marine Chemical Research Institute (CSMCRI); Council of Scientific and Industial Research (CSIR); G.B. Marg Bhavnagar- 364002, Gujrat India
| | - Rajkumar Tak
- Division of Inorganic Material and Catalysis; Central Salt and Marine Chemical Research Institute (CSMCRI); Bhavngar- 364002, Gujrat India
- Academy of Scientific and Innovative Research (AcSIR); Central Salt and Marine Chemical Research Institute (CSMCRI); Council of Scientific and Industial Research (CSIR); G.B. Marg Bhavnagar- 364002, Gujrat India
| | - Rukhsana I. Kureshy
- Division of Inorganic Material and Catalysis; Central Salt and Marine Chemical Research Institute (CSMCRI); Bhavngar- 364002, Gujrat India
- Academy of Scientific and Innovative Research (AcSIR); Central Salt and Marine Chemical Research Institute (CSMCRI); Council of Scientific and Industial Research (CSIR); G.B. Marg Bhavnagar- 364002, Gujrat India
| | - Noor-ul H. Khan
- Division of Inorganic Material and Catalysis; Central Salt and Marine Chemical Research Institute (CSMCRI); Bhavngar- 364002, Gujrat India
- Academy of Scientific and Innovative Research (AcSIR); Central Salt and Marine Chemical Research Institute (CSMCRI); Council of Scientific and Industial Research (CSIR); G.B. Marg Bhavnagar- 364002, Gujrat India
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