(S)-3-(tert-Butyl-dimethyl-silanyloxy)-5-methoxy-7-oxo-8-((2R,4S,6R)-2-phenyl-6-trityloxymethyl-[1,3]dioxan-4-yl)-octanoic acid (S)-1-naphthalen-2-yl-ethyl ester 在
吡啶 、
2,6-二甲基吡啶 、 camphor-10-sulfonic acid 、
magnesium trifluoroacetate 、
三氟乙酸 作用下,
反应 15.0h,
生成
[(2S,4S,6R,8R,10S)-10-(tert-Butyl-dimethyl-silanyloxy)-4-methoxy-8-trityloxymethyl-1,7-dioxa-spiro[5.5]undec-2-yl]-acetic acid (S)-1-naphthalen-2-yl-ethyl ester