A New Synthesis of Imidazolidin-2-ones via Pd-Catalyzed Carboamination of <i>N</i>-Allylureas
作者:Jonathan A. Fritz、Josephine S. Nakhla、John P. Wolfe
DOI:10.1021/ol060707b
日期:2006.6.1
A new strategy for the preparation of substituted imidazolidin-2-ones in two steps from readily available N-allylamines is described. Addition of the amine starting materials to isocyanates affords N-allylureas, which are converted to imidazolidin-2-one products with generation of two bonds and up to two stereocenters when treated with aryl bromides and catalytic amounts of Pd-2(dba)(3)/Xantphos in the presence of (NaOBu)-Bu-t.