2,6-di-tert-butyl-4-methylphenyl propionate 、
(R)-(+)-2,2-二甲基-1,3-二氧戊环-4-甲醛 在
lithium diisopropyl amide 作用下,
以
四氢呋喃 为溶剂,
生成
(4R)-2.6-di-tert-butyl-4-methylphenyl-4,5-O-Isopropylidene-3,4,5-trihydroxy-2-methylpentanoate 、 (4R)-2.6-di-tert-butyl-4-methylphenyl-4,5-O-Isopropylidene-3,4,5-trihydroxy-2-methylpentanoate 、 (4R)-2.6-di-tert-butyl-4-methylphenyl-4,5-O-Isopropylidene-3,4,5-trihydroxy-2-methylpentanoate 、 (4R)-2.6-di-tert-butyl-4-methylphenyl-4,5-O-Isopropylidene-3,4,5-trihydroxy-2-methylpentanoate