The trifluoromethylation of (Z)/(E)-tert-butyl (4S)-4-(2'-ethoxycarbonyl-2'-bromoprop-1'-enyl)-2,2-dimethyloxazolidine-3-carboxylate (4), which is derived from chiral serine aldehyde, yields α-trifluoromethyl-α,β-unsaturated ester 1. Compound 1 is used as a key intermediate for the synthesis of a number of 2',3'-dideoxy-2'-trifluoromethyl-N-azanucleosides.
三氟甲基化(Z)/(E)-叔丁基(4S)-4-(2'-乙氧羰基-2'-溴丙-1'-烯基)-2,2-二甲基唑啉-3-羧酸酯(4),它来源于手性丝氨酸醛,可得到α-三氟甲基-α,β-不饱和酯1。化合物1被用作合成多种2',3'-二脱氧-2'-三氟甲基-N-杂环核苷的重要中间体。