A facile protocol for the preparation of 5-alkylidene and 5-imino substituted hydantoins from N,N′-disubstituted parabanic acids
作者:Şevket Hakan Üngören、İbrahim Kani、Ahmet Günay
DOI:10.1016/j.tetlet.2012.06.129
日期:2012.8
A convenient procedure for the preparation of various substituted (thio)hydantoins is described. The method is based on Wittig and aza-Wittig reactions of parabanic acids with phosphonium ylides. The reactions occurred both regio- and stereo-selectively.