Synthesis of 2-aminobenzo[b]thiophenes from 4-(2-haloaryl)-1,2,3-thiadiazoles
作者:D. A. Androsov、E. A. Popova、M. L. Petrov、A. I. Ponyaev
DOI:10.1134/s1070363214120093
日期:2014.12
A new approach to the synthesis of 2-aminobenzo[b]thiophenes was developed on the basis of reaction of 4-aryl-1,2,3-thiadiazoles with amines in the presence of potassium carbonate. The effect of the nature of substituent in the benzene ring of the starting 4-aryl-1,2,3-thiadiazoles on the structure of the final product was studied.
在碳酸钾的存在下,基于4-芳基-1,2,3-噻二唑与胺的反应,开发了一种新的2-氨基苯并[ b ]噻吩合成方法。研究了起始4-芳基-1,2,3-噻二唑苯环中取代基的性质对最终产物结构的影响。
The efficient synthesis of γ-thiapyrones by a base-mediated Diels–Alder/retro-Diels–Alder reaction of α-pyrones with 5-H-1,2,3-thiadiazoles is reported herein. Thioketenes in situ generated from thiadiazoles as electron-poor dienophile and electron-rich 4-hydroxy-2-pyrones as dienes are conjunctively transformed into a series of γ-thiapyrones with broad functional group compatibility in good to excellent
Parallel Synthesis of 1,2,3-Thiadiazoles Employing a “Catch and Release” Strategy
作者:Yonghan Hu、Sylvie Baudart、John A. Porco
DOI:10.1021/jo981874v
日期:1999.2.1
A Convenient Approach to 2-Aminobenzo[b]chalcogenophenes Based on Copper-Catalyzed Transformation of 4-(2-Bromophenyl)-1,2,3-chalcogenodiazoles in the Presence of a Base and Amines
作者:E. A. Popova、A. G. Lyapunova、M. L. Petrov、T. L. Panikorovskii、D. A. Androsov
DOI:10.1134/s1070363218040126
日期:2018.4
The reactions of 4-(2-bromophenyl)-1,2,3-thia-and -selenadiazoles with amines in the presence of potassium carbonate and copper(I) iodide afforded 2-aminobenzo[b]chalcogenophenes. The corresponding thiaand selenamides, prepared by interaction of 4-(2-bromophenyl)-1,2,3-thia- and -selenadiazoles with amines in the absence of copper salt, were transformed into 2-aminobenzo[b]chalcogenophenes by the action of potassium carbonate and copper(I) iodide in DMF in different yields.