Metal-Free Ring Expansions of Methylenecyclopropanes Through Nitrene Equivalent
作者:Di-Han Zhang、Yin Wei、Min Shi
DOI:10.1002/ejoc.201100629
日期:2011.7.19
An interesting nitrene equivalent mediated metal-free ring expansion of methylenecyclopropanes was developed in the presence of iodosobenzenediacetate (PIDA) and 3-amino-2-ethyl-4(3H)-quinazolinone under mild conditions. A variety of cyclobutylidene hydrazine derivatives were obtained in moderate to excellent yields as separable (Z)/(E) isomeric mixtures.