2-Methyl-2-((2S)-2-methyl-1-oxo-pent-5-yl)-1,3-dioxolane 、
(4S)-4-(2-methyl-3-oxohept-6-en-2-yl)-2,2-dimethyl[1,3]dioxane 在
zinc(II) chloride
正丁基锂 、
二异丙胺 作用下,
以
四氢呋喃 、
正己烷 为溶剂,
反应 5.08h,
生成 (4S,4'R,5'S,6'S,10S)-4-[2,6-dimethyl-3-oxo-4-allyl-5-hydroxy-9-(2-methyl-1,3-dioxolan-2-yl)-nonan-2-yl]-2,2-dimethyl-1,3-dioxan 、
(4S,4'R,5'S,6'S,10R)-4-[2,6-dimethyl-3-oxo-4-allyl-5-hydroxy-9-(2-methyl-1,3-dioxolan-2-yl)-nonan-2-yl]-2,2-dimethyl-1,3-dioxan