(2E,6E,8E)-(4R,5R,10S,11R,12S)-5-Hydroxy-11-(4-methoxy-benzyloxy)-2,4,6,8,10,12-hexamethyl-docosa-2,6,8-trienethioic acid S-[(1R,2S,3R)-4-hydroxy-2,3-bis-(4-methoxy-benzyloxy)-1-(4-methoxy-benzyloxymethyl)-butyl] ester 在
吡啶 、
戴斯-马丁氧化剂 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以31%的产率得到(2E,6E,8E)-(4R,10S,11R,12S)-11-(4-Methoxy-benzyloxy)-2,4,6,8,10,12-hexamethyl-5-oxo-docosa-2,6,8-trienethioic acid S-[(1R,2S,3S)-2,3-bis-(4-methoxy-benzyloxy)-1-(4-methoxy-benzyloxymethyl)-4-oxo-butyl] ester