(2R,4'R,5'R)-3-benzyloxy-2-benzyloxycarbonylamino-2-(2',2'-dimethyl-5'-[2''-(1-phenyl-1H-tetrazol-5-sulfonyl)ethyl]-[1',3']dioxolan-4'-yl)propionic acid 8-phenylmenthyl ester 、
7-(2-hexyl-1,3-dioxolan-2-yl)heptanal 在
sodium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
反应 0.5h,
以59%的产率得到(2R,4'R,5'R,2''E)-3-benzyloxy-2-benzyloxycarbonylamino-2-(5'-[9''-(2'''-hexyl-[1''',3''']dioxolan-2'''-yl)non-2''-enyl]-2',2'-dimethyl-[1',3']dioxolan-4'-yl)-propionicacid 8-phenylmenthyl ester