Nitrosation of 2-aryl-1,1-dibromocyclopropanes: synthesis of 3-aryl-5-bromoisoxazoles
作者:Oksana B. Bondarenko、Aleksandr A. Vinogradov、Pavel A. Danilov、Svetlana N. Nikolaeva、Anna Yu. Gavrilova、Nikolai V. Zyk
DOI:10.1016/j.tetlet.2015.10.026
日期:2015.11
An efficient transformation of 2-aryl-1,1-dibromocyclopropanes under the action of sulfur trioxide activated nitrosylchloride has been developed, providing a series of arylated 5-bromoisoxazoles with good yields. It is noteworthy that under the reported conditions the nitrosation–heterocyclization reaction proceeded with high regioselectivity leading exclusively to 3-aryl-5-bromoisoxazoles.