Title:Propiolic Acids in the Synthesis of N-heterocycles
Volume: 20
Issue: 7
Author(s): Zhan-Yong Wang*, Zhantong Liu, Nan Wang and Yuanfeng Tong*
Affiliation:
- School of Pharmacy, Xinxiang University, Xinxiang, Henan 453003, P.R. China
- Beijing Sun-Novo Pharmaceutical
Research Co., Ltd., Beijing, P.R. China
Keywords:
Propiolic acids, N-heterocycles, tandem reaction, thiazinones, spiroindolines, radical.
Abstract:
This review discussed the synthetic applications of propiolic acids in the preparation of
diverse N-heterocycles. 3~9-membered rings like azirines, β-lactams, oxazolidin-2-ones, 2-oxindoles,
indoles, isoindolin-1-ones, imidazo[1,2-a]pyridines, triazoles, 2-pyridones, 2-quinolones, 1,4-
benzothiazines, thiazinones, spiroindolines, etc. could be constructed via radical addition, fourcomponent
Ugi reactions, 1,3-dipolar cycloadditions, or Diels-Alder reaction mechanism. We hope
this review will promote future research in this area:
Introduction; Synthesis of azirines; Synthesis of lactams; Construction of five-membered rings; Construction
of six-membered rings; Double cyclization for N-heterocycles; Construction of 7~9-
membered rings; Conclusion.