丙酮 、
(2S,3S,4S)-4-tert-Butoxy-3-(2-hydroxy-ethyl)-2-hydroxymethyl-3-methyl-cycloheptanol 在
对甲苯磺酸 作用下,
以
二氯甲烷 为溶剂,
生成 2-[(6S)-tert-butoxy-2,2,5-trimethyl-octahydro-cyclohepta[1,3]dioxin-(5S)-yl]-ethanol 、 2-[(6S)-tert-butoxy-2,2,5-trimethyl-octahydro-cyclohepta[1,3]dioxin-(5S)-yl]-ethanol