A highly enantioselective (S)-diphenylpyrrolinol triethylsilyl ether promoted tandem oxa-Michaelâaldol reaction of α,β-unsaturated aldehydes with salicylaldehydes has been developed; the method affords one-pot access to chiral and synthetically useful chromenes in high yields and high enantioselectivities from readily available compounds.
开发了一种高对映体选择性 (S)-diphenylpyrrolinol triethylsilyl ether 促进的δ,δ-不饱和醛与
水杨醛的串联 oxa-Michaelâaldol 反应;该方法提供了从现成化合物高产率和高对映体选择性地一次性获得手性和合成上有用的色烯的途径。