gem-dichloro(alkyl)cyclopropanes in reactions with NOCl·2SO3: Synthesis of alkyl-5-chloroisoxazoles
作者:N. V. Zyk、O. B. Bondarenko、A. Yu. Gavrilova、A. O. Chizhov、N. S. Zefirov
DOI:10.1007/s11172-011-0053-7
日期:2011.2
Nitrosation of gem-dichloro(alkyl)cyclopropanes with the complex NOCl·2SO3 gave regioisomeric alkyl-5-chloroisoxazoles in high yields; a similar reaction with 1,2-bis(gem-dichlorocyclopropyl)ethane afforded the corresponding bis(5-chloroisoxazoles). The reactivities of gem-dichlorobicyclo[n.1.0]alkanes depend on their spatial structures, sharply decreasing with an increase in the number of the methylene units in the bicyclic molecule.
New system for nitrosation of alkyl-substituted gem-dichlorocyclopropanes
作者:Oksana B. Bondarenko、Anna Yu. Gavrilova、Dilovar S. Murodov、Nikolai V. Zyk、Nikolai S. Zefirov
DOI:10.1016/j.mencom.2011.07.004
日期:2011.7
Treatment of alkyl-substituted gem-dichlorocyclopropanes with NOCl-AlCl(3) system affords alkyl-5-chloroisoxazoles.
Nitrosylsulfuric acid in the synthesis of 5-chloroisoxazoles from 1,1-dichlorocyclopropanes
作者:Oksana B. Bondarenko、Zaur M. Garaev、Arseniy I. Komarov、Lyubov I. Kuznetsova、Svetlana V. Gutorova、Dmitry A. Skvortsov、Nikolai V. Zyk
DOI:10.1016/j.mencom.2019.07.021
日期:2019.7
Nitrosylsulfuric acid is shown to be a usable reagent for the synthesis of 5-chioroisoxazoles from readily available 1,1-dichlorocyclopropanes via nitrosation-heterocyclization reaction. A cytotoxicity of some of the prepared 5-chloroisoxazoles towards MCF7, A549, HEK293T and VA13 cell lines was evaluated.
Synthesis of 5-Chloroisoxazoles Derived from 2,2-Dichlorovinyl Ketones
作者:A. V. Popov、V. A. Kobelevskaya、I. D. Titov、L. I. Larina、I. B. Rozentsveig
DOI:10.1134/s107042802011010x
日期:2020.11
Abstract The reactions of 2,2-dichlorovinyl ketones with hydroxylamine hydrochloride give the corresponding oximes. The subsequent heterocyclization of the latter under the action of t-BuOK in t-BuOH results in selective formation of 5-chloro-3-alkyl- or 5-chloro-3-aryl-substituted isoxazoles in good yields.