(3R,4S,5R,7S,8R,12R)-5-(benzyloxy)-12-((2S,3S,6R,8S,9R)-3,9-dimethyl-8-((S)-3-(2-methyl-1,3-dithian-2-yl)butyl)-1,7-dioxaspiro[5.5]undecan-2-yl)-4-methoxy-7-((4-methoxybenzyl)oxy)-2,8-dimethyl-9-oxotridecan-3-yl acetate 在
L-Selectride 作用下,
以
四氢呋喃 为溶剂,
生成 [2R,2(2S,3S,6R,8S,8(3S),9R),5(SR),6S,7S,9R,10S,11R]-11-acetoxy-9-benzyloxy-2-{3,9-dimethyl-8-[3-(2-methyl-1,3-dithian-2-yl)butyl]-1,7-dioxaspiro[5.5]undecan-2-yl}-10-methoxy-7-(4-methoxybenzyl)oxy-6,12-dimethyl-5-tridecanol