FAN Zong-liang, ZHANG Cai-xia, LI Gui-xian

(College of Petrochemical Technology , Lanzhou Univ. of Tech. , Lanzhou  730050 , China)

Abstract: A series of Keggin type heteropoly acids were synthesized. Their FT-IR and X-ray  spectroscopy indicated that the catalyst structures were Keggin type. 1,1-diacetates was efficiently synthesized over M_xPW₁₂O₄₀·nH₂O and M_xPMo₁₂O₄₀·nH₂O catalysts(M=Fe、Mn、Ni、Cu、Zn; x=1、1.5). Experimental results showed that a series of aldehydes could react with acetic  anhydride to produce corresponding 1,1-diacetates at room temperature under solvent-free conditions by using heteropoly acid as catalyst, Among the tested catalysts. FePW₁₂O₄₀ is the best one and under optimum conditions, i.e., FePW₁₂O₄₀ catalyst amount, 0.034 mmol; reaction time 5 min, molar ratio of Aldehyde and Acetic Anhydride=1: 3, and 59.19-94.85% yield of  the corresponding 1,1-diacetates could be obtained.

Key words: aldehyde; catalyze; 1,1-diacetates

E-mail: lgxgd@lut.cn

Journal of Molecular Catalysis, Vol. 25, Issue 1, 2011, 64~68.