苯甲醛 、
(1S,2R)-N-methylephedrine propionate derived E silyl ketene acetal 在
四氯化钛 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
生成 [(1S,2S)-2-(dimethylamino)-1-phenylpropyl] (2R,3S)-3-hydroxy-2-methyl-3-phenylpropanoate 、 [(1S,2S)-2-(dimethylamino)-1-phenylpropyl] (2R,3R)-3-hydroxy-2-methyl-3-phenylpropanoate 、 [(1S,2S)-2-(dimethylamino)-1-phenylpropyl] (2S,3S)-3-hydroxy-2-methyl-3-phenylpropanoate 、 [(1S,2S)-2-(dimethylamino)-1-phenylpropyl] (2S,3R)-3-hydroxy-2-methyl-3-phenylpropanoate