(S)-2-((R)-1,2-Dimethyl-propoxycarbonylamino)-3,3-dimethyl-butyric acid 、
波普瑞韦中间体 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
生成 (1R,2S,5S)-3-[(S)-2-((R)-1,2-Dimethyl-propoxycarbonylamino)-3,3-dimethyl-butyryl]-6,6-dimethyl-3-aza-bicyclo[3.1.0]hexane-2-carboxylic acid methyl ester