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.
gem-二氯(烷基)环丙烷与复合物NOCl·2SO3的硝化反应高产率地生成了区域异构的烷基-5-氯异噁唑;与1,2-双(gem-二氯环丙基)乙烷的类似反应则生成了相应的双(5-氯异噁唑)。gem-二氯双环[n.1.0]烷烃的反应性取决于它们的空间结构,随着双环分子中亚甲基单元数量的增加而急剧下降。