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author:

Wan, Q. (Wan, Q..) [1] | Zheng, C. (Zheng, C..) [2] | Yuan, Y.-F. (Yuan, Y.-F..) [3] (Scholars:袁耀锋) | You, S.-L. (You, S.-L..) [4]

Indexed by:

Scopus CSCD

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 centers 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 addition, the synthetic potential of this method was showcased by versatile transformations of the product. © 2022 Science China Press

Keyword:

Asymmetric catalysis Dearomatization Imidazo[1,2-a]pyridine Interrupted Barton-Zard reaction Isocyanoacetates

Community:

  • [ 1 ] [Wan, Q.]State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
  • [ 2 ] [Wan, Q.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
  • [ 3 ] [Zheng, C.]State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
  • [ 4 ] [Yuan, Y.-F.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
  • [ 5 ] [You, S.-L.]State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China

Reprint 's Address:

  • 袁耀锋

    [Yuan, Y.-F.]College of Chemistry, China

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Source :

Science Bulletin

ISSN: 2095-9273

Year: 2022

Issue: 16

Volume: 67

Page: 1688-1695

1 8 . 9

JCR@2022

1 8 . 8 0 0

JCR@2023

ESI HC Threshold:117

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 5

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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