Safe generation and use of bromine azide under continuous flow conditions – selective 1,2-bromoazidation of olefins
作者:David Cantillo、Bernhard Gutmann、C. Oliver Kappe
DOI:10.1039/c5ob02425k
日期:——
Hazardous bromine azide (BrN3) can be safely generated and reacted with olefins in a continuous flow reactor under irradiation with light.
危险的溴化氮化合物(BrN₃)可以在连续流动反应器中,在光照下安全地生成并与烯烃发生反应。
Reactivity of 2-halo-2H-azirines. Part 3: Dehalogenation of 2-halo-2H-azirine-2-carboxylates
作者:Teresa M.V.D Pinho e Melo、Ana L Cardoso、António M.d'A Rocha Gonsalves
DOI:10.1016/s0040-4020(03)00248-5
日期:2003.3
The dehalogenation of 2-halo-3-phenyl-2H-azirine-2-carboxylates is described. Using sodium borohydride and tributyltin hydride 3-phenyl-2H-azirine-2-carboxylates were obtained in moderate yields. The synthesis of a new 2-bromo-2H-azirines with a chiral auxiliary, 10-phenylsulfonylisobornyl 2-bromo-3-phenyl-2H-azirine-2-carboxylate, is reported. Its dehalogenation led to 10-phenylsulfonylisobomyl 2H-azirine-2-carboxylate as single stereoisomer together with the formation of 10-phenylsulfonylisobomyl acetate. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of polyfunctional imidazoles from vinyl azides and amidine along with NHBoc as a leaving group
An efficient method for the synthesis of polyfunctional imidazoles from vinyl azides and amidine has been developed. Starting from vinyl azide and amidine, this transformation proceeds without any additives and the obtained imidazoles can be decorated with ester functional group that is a promising site for further modification.
An efficient annulation of vinylazides with activated imines has been developed for the synthesis of poly-functionalized imidazole derivatives. This reaction includes thermal decomposition of vinylazides to 2H-azirines, nucleophilic attack of 2H-azirines with activated imines and subsequent cyclization to desired imidazoles.