作者:Radim Hrdina、Christian E. Müller、Raffael C. Wende、Katharina M. Lippert、Mario Benassi、Bernhard Spengler、Peter R. Schreiner
DOI:10.1021/ja110685k
日期:2011.5.25
We present a new class of catalysts based on the combination of N,N'-diaryl(thio)ureas and weak silicon Lewis acids (e.g., SiCl(4)). Such silicon-(thio)urea catalysts effectively catalyze the stereospecific rearrangement of epoxides to quaternary carbaldehydes.