51
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Dai L, Lin L, Zheng J, Zhang D, Liu X, Feng X. N,N′-Dioxide/Gd(OTf)3 Complex-Promoted Asymmetric Aldol Reaction of Silyl Ketene Imines with Isatins: Water Plays an Important Role. Org Lett 2018; 20:5314-5318. [DOI: 10.1021/acs.orglett.8b02239] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Li Dai
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jianfeng Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Dong Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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52
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Yang J, Ke C, Zhang D, Liu X, Feng X. Enantioselective Synthesis of 2,2,3-Trisubstituted Indolines via Bimetallic Relay Catalysis of α-Diazoketones with Enones. Org Lett 2018; 20:4536-4539. [DOI: 10.1021/acs.orglett.8b01744] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Chaoqi Ke
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Dong Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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53
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Zhou W, Zhang YX, Nie XD, Si CM, Sun X, Wei BG. Approach to Chiral 1-Substituted Isoquinolone and 3-Substituted Isoindolin-1-one by Addition-Cyclization Process. J Org Chem 2018; 83:9879-9889. [PMID: 29952568 DOI: 10.1021/acs.joc.8b01282] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An approach to access 1-substituted isoquinolones has been developed through the addition-cyclization of imines with Grignard reagents in the presence of 2,2'-dipyridyl. A number of substituted aromatic magnesium reagents were amenable to this process, and the desired products were obtained with excellent yields and outstanding diastereoselectivities ( dr > 99:1). The utility of this convenient approach is demonstrated by the formal synthesis of ( S)-cryptostyline II. Moreover, N-methylmorpholine (NMM) was found to be an effective additive for the formation of 3-substituted isoindolin-1-ones using one-pot addition-cyclization-deprotection of imine with Grignard reagents.
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Affiliation(s)
- Wen Zhou
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Yan-Xue Zhang
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Xiao-Di Nie
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Chang-Mei Si
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Xun Sun
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
| | - Bang-Guo Wei
- Department of Natural Products Chemistry, School of Pharmacy , Fudan University , 826 Zhangheng Road , Shanghai , 201203 , The People's Republic of China
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54
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Affiliation(s)
- Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education; College of Chemistry, Sichuan University; Chengdu Sichuan 610064 China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education; College of Chemistry, Sichuan University; Chengdu Sichuan 610064 China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education; College of Chemistry, Sichuan University; Chengdu Sichuan 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education; College of Chemistry, Sichuan University; Chengdu Sichuan 610064 China
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55
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Chen L, Sun C, Feng G, Cao M, Zhao SL, Yan J, Wan RZ, Liu L. Direct oxidative C-H alkynylation of N-carbamoyl tetrahydroisoquinolines and dihydroisoquinolines. Org Biomol Chem 2018; 16:2792-2799. [PMID: 29611855 DOI: 10.1039/c8ob00373d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient oxidative C-H alkynylation of N-carbamoyl tetrahydroisoquinolines mediated by a TEMPO oxoammonium salt has been established. A variety of electronically varied N-carbamoyl tetrahydroisoquinolines reacted with a range of alkynyl potassium trifluoroborates smoothly under mild metal-free conditions. Dihydroisoquinolines were also suitable components for the reaction. The synthetic applicability of the method for facile access to structurally diverse bioactive molecules was further demonstrated.
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Affiliation(s)
- Lei Chen
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China.
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56
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Yang Y, Li Y, Cheng C, Yang G, Zhang J, Zhang Y, Zhao Y, Zhang L, Li C, Tang L. Synthesis of 4-Aryl Isoquinolinedione Derivatives by a Palladium-Catalyzed Coupling Reaction of Aryl Halides with Isoquinoline-1,3(2 H,4 H)-diones. J Org Chem 2018; 83:3348-3353. [PMID: 29400968 DOI: 10.1021/acs.joc.7b02961] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The palladium-catalyzed cross-coupling reaction of aryl halides with isoquinoline-1,3(2 H,4 H)-diones for the synthesis of 4-aryl isoquinoline-1,3(2 H,4 H)-diones was developed. The reaction conditions exhibit remarkable compatibility with various aryl halides and isoquinoline-1,3(2 H,4 H)-diones, and the product could be conveniently transformed to 4-aryl tetrahydroisoquinolines. (±) Dichlorofensine was synthesized using this protocol in two steps with an overall yield of 71%.
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Affiliation(s)
- Yuanyong Yang
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China.,State Key Laboratory of Functions and Applications of Medicinal Plants , Guizhou Medical University , Guiyang 550014 , China
| | - Yingxian Li
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China
| | - Cheng Cheng
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China
| | - Guo Yang
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China
| | - Jiquan Zhang
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China.,State Key Laboratory of Functions and Applications of Medicinal Plants , Guizhou Medical University , Guiyang 550014 , China
| | - Yi Zhang
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China.,State Key Laboratory of Functions and Applications of Medicinal Plants , Guizhou Medical University , Guiyang 550014 , China
| | - Yonglong Zhao
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China.,State Key Laboratory of Functions and Applications of Medicinal Plants , Guizhou Medical University , Guiyang 550014 , China
| | - Lin Zhang
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China.,State Key Laboratory of Functions and Applications of Medicinal Plants , Guizhou Medical University , Guiyang 550014 , China
| | - Chun Li
- School of Pharmacy , Guizhou Medical University , Guiyang 550004 , China.,State Key Laboratory of Functions and Applications of Medicinal Plants , Guizhou Medical University , Guiyang 550014 , China
| | - Lei Tang
- State Key Laboratory of Functions and Applications of Medicinal Plants , Guizhou Medical University , Guiyang 550014 , China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica , Chinese Academy of Sciences , Shanghai 201203 , China
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57
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Oss G, de Vos SD, Luc KNH, Harper JB, Nguyen TV. Tropylium-Promoted Oxidative Functionalization of Tetrahydroisoquinolines. J Org Chem 2018; 83:1000-1010. [DOI: 10.1021/acs.joc.7b02584] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Giulia Oss
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Sander D. de Vos
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Kevin N. H. Luc
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Jason B. Harper
- School of Chemistry, University of New South Wales, Sydney, Australia
| | - Thanh V. Nguyen
- School of Chemistry, University of New South Wales, Sydney, Australia
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58
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He H, Qin HB. ZnBr 2-catalyzed direct C-glycosylation of glycosyl acetates with terminal alkynes. Org Chem Front 2018. [DOI: 10.1039/c8qo00380g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
C-Alkynyl glycosides were synthesizedviaZnBr2-catalyzed cross-coupling of glycosyl acetates with terminal alkynes.
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Affiliation(s)
- Haiqing He
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- and Yunnan Key Laboratory of Natural Medicinal Chemistry
- Kunming 650201
| | - Hong-Bo Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- and Yunnan Key Laboratory of Natural Medicinal Chemistry
- Kunming 650201
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59
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Satheesh V, Vivek Kumar S, Punniyamurthy T. Expedient stereospecific Co-catalyzed tandem C–N and C–O bond formation of N-methylanilines with styrene oxides. Chem Commun (Camb) 2018; 54:11813-11816. [DOI: 10.1039/c8cc06223d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Co(ii)-catalyzed stereospecific sequential C–N and C–O bond formation of styrene oxides with N-methylanilines has been developed. Optically active epoxides can be coupled with high enantiomeric purity.
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Affiliation(s)
- Vanaparthi Satheesh
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781039
- India
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