Benzalacetone 1,2-propylene glycol ketal was synthesized from benzalacetone and 1,2-propylene glycol in the presence of ptoluene sulphonic acid.

以甲苯磺酸为催化剂,通过叉丙酮与-1,2-丙二醇反应合叉丙酮-1,2-丙二醇缩酮。