(2R,3S,4E,6S)-3-[tert-butyl(dimethyl)silyl]oxy-2,4,6,8-tetramethylnona-4,7-dienal 、 (5R,6R,7R)-7-((tert-butyldimethylsilyl)oxy)-5-methoxy-9-((4-methoxybenzyl)oxy)-4,4,6-trimethylnonan-3-one 在
四氯化钛 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 4.5h,
以62%的产率得到(5R,6R,7R,10S,11R,12S,13S)-11-hydroxy-7-methoxy-5-{2-[(4-methoxybenzyl)oxy]ethyl}-2,2,3,3,6,8,8,10,12,15,15,16,16-tridecamethyl-13-[(1E,3S)-1,3,5-trimethylhexa-1,4-dienyl]-4,14-dioxa-3,15-disila-heptadecan-9-one