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三氯化铁催化合成丁醛1,2丙二醇缩醛
RARE METALS, Vol. 27, No. 1, Feb 2008, p. 89
Catalytic synthesis of acetals and ketals with H PW O /PAn
3 12 40
a, b a a b
YANG Shuijin , ZHANG Yijun , DU Xinxian , and Philippe G. Merle
a Hubei Key Laboratory of Bioanalytical Technique, Department of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435002, China
b Department of Chemistry and Biochemistry, Concordia University, Montreal H4B 1R6, Canada
Received 28 September 2006; received in revised form 21 November 2006; accepted 28 November 2006
Abstract
A new environmental friendly catalyst H3PW12O40/PAn was prepared and identified by means of FT-IR, XRD, and TG/DTA. The optimum
conditions have been found; that is, the mass ratio of PAn to H PW O is 1:1.5, the volume of methanol is 20 mL, and the reflux reaction
3 12 40
time is 3 h. The structural identity of Keggin units is preserved after the incorporation into polyaniline matrix. Catalytic activities of
H PW O /PAn in synthesizing 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane,2,4-dimethyl-2-ethoxycarbonylmethyl-1,3-dioxolane, cy-
3 12 40
clohexanone ethylene ketal, cyclohexanone 1,2-propanediol ketal, butanone ethylene ketal, butanone 1,2-propanediol ketal, 2-phenyl-1,3-di-
oxolane, 4-methyl-2-phenyl-1,3-dioxolane, 2-propyl-1,3-dioxolane, and 4-methyl-2-propyl-1,3-dioxolane were reported. It has been demon-
strated that H3PW12O40/PAn is an excellent catalyst. Various factors concerned in these reactions were investigated. The
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