(3S)-3-tert-butyldimethylsilyloxy-5-hydroxy-8-[2-phenyl-4-(R)-(triphenylmethyloxy)methyl-1,3-dioxan-6(S)-yl]-octan-7-on-1-oic acid-2(S)-napthylethanol ester 在
2,6-二叔丁基-4-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,6S,8R,10S)-10-Hydroxy-8-hydroxymethyl-4-methoxy-1,7-dioxa-spiro[5.5]undec-2-yl)-acetic acid (S)-1-naphthalen-2-yl-ethyl ester