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author:

Qian Wan (Qian Wan.) [1] | Chao Zheng (Chao Zheng.) [2] | Yao-Feng Yuan (Yao-Feng Yuan.) [3] (Scholars:袁耀锋) | Shu-Li You (Shu-Li You.) [4]

Abstract:

Imidazo[1,2-a]pyridines are present in numerous biologically active compounds as the core structural motif.Herein,we report an asymmetric interrupted Barton-Zard reaction of electron-deficient imidazo[1,2-a]pyridines with α-substituted isocyanoacetates.The reaction enables the dearomatization of 8-nitroimidazo[1,2-a]pyridines and hence offers straightforward access to an array of optically active highly functionalized imidazo[1,2-a]pyridine derivatives that possess three contiguous stereogenic cen-ters in good yields(up to 98%)with high stereoselectivities(>19:1 dr,>99%ee).It is worth noting that the catalytic system consisting of a chiral squaramide and silver oxide displays remarkable reactivity and stereoselectivity,and a gram-scale reaction is compatible with the catalyst loading of 0.5 mol%.In addi-tion,the synthetic potential of this method was showcased by versatile transformations of the product.

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  • [ 1 ] [Qian Wan]State Key Laboratory of Organometallic Chemistry,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China;College of Chemistry,Fuzhou University,Fuzhou 350108,China
  • [ 2 ] [Yao-Feng Yuan]福州大学
  • [ 3 ] [Chao Zheng]中国科学院上海有机化学研究所
  • [ 4 ] [Shu-Li You]中国科学院上海有机化学研究所

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Source :

科学通报(英文版)

ISSN: 1001-6538

CN: 11-1785/N

Year: 2022

Issue: 16

Volume: 67

Page: 1688-1695

1 . 6 4 9

JCR@2016

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count: -1

Chinese Cited Count:

30 Days PV: 0

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