1,3-环己二酮 、
2,2-二甲基-1,3-丙二醇 以
甲苯 为溶剂,
以125 g (630 mmole) 3,3-dimethyl-1,5-dioxa-spiro[5,5] undecan-8-one, which was obtained by the azeotropic acetylation of cyclohexane-1,3-dione with 2,2-dimethylpropane-1,3-diol in toluene as a solvent的产率得到3,3-dimethyl-1,5-dioxa-spiro[5.5] undecan-8-one