巴豆酸甲酯 、
(4S,5S)-4,5--2-(2-methyl-2-propenidene)-1,3-dioxolane 以
甲苯 为溶剂,
反应 80.0h,
生成 (2R,3R,6R,7S)-2,3-Bis-methoxymethyl-7,9-dimethyl-1,4-dioxa-spiro[4.5]dec-9-ene-6-carboxylic acid methyl ester 、 (2R,3R,6S,7R)-2,3-Bis-methoxymethyl-7,9-dimethyl-1,4-dioxa-spiro[4.5]dec-9-ene-6-carboxylic acid methyl ester