在固体超强酸 TiO2/SO42-催化下，以苯或甲苯为脱水 剂，季戊四醇与醛、酮反应，制得了产率为85%～97%的双缩醛或双缩酮.
Synthesis of diacetals in 85%～97% yields from aldehydes and ketones with 2,2-bis(hydroxymethyl)propane-1,3-diol is carried out in refluxin g benzene or toluene with TiO2/SO42- solid superacid as catalyst.
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