Synthesis of acetals and ketals catalyzed by tungstosilicic acid supported on active carbon

• Published in: Journal of Zhejiang University. B. Science Vol. 6; no. 5; pp. 373 - 377
• Main Author: 杨水金 杜心贤 贺兰 孙聚堂
• Format: Journal Article
• Language: English
• Published: China Springer Nature B.V 01.05.2005; Department of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435002, China%School of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China; Zhejiang University Press
• Subjects: Acetals; Activated carbon; Aldehydes; Carbon; Catalysts; Catalytic activity; Chemical synthesis; Chemistry & Chemical Engineering; Cyclohexanone; Ethylene; Ketones; Reaction time; 乙酰胺; 催化剂; 催化反应; 合成方法; 活性碳; 钨硅酸; Aceta; Active carbon; Tungstosilicic acid; Catalysis; Ketal
• ISSN: 1673-1581; 1862-1783
• DOI: 10.1631/jzus.2005.B0373

Catalytic activity of activated carbon supported tungstosilicic acid in synthesizing 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane, 2,4-dimethyl-2-ethoxycarbonylmethyl-l,3-dioxolane, cyclohexanone ethylene ketal, cyclohexanone 1,2-propanediol ketal, butanone ethylene ketal, butanone 1,2-propanediol ketal, 2-phenyl-1,3-dioxolane, 4-methyl-2-phenyl-1,3-dioxolane,2-propyl- 1,3-dioxolane, 4-methyl-2-propyl-1,3-dioxolane was reported. It has been demonstrated that activated carbon supported tungstosilicic acid is an excellent catalyst. Various factors involved in these reactions were investigated. The optimum conditions found were: molar ratio of aldehyde/ketone to glycol is 1/1.5, mass ratio of the catalyst used to the reactants is 1.0%, and reaction time is 1.0 h. Under these conditions, the yield of 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane is 61.5%, of 2,4-dimethyl-2-ethoxycarbonylmethyl-1,3-dioxolane is 69.1%, of cyclohexanone ethylene ketal is 74.6%, of cyclohexanone 1,2-propanediol ketal is 80.1%, of butanone ethylene ketal is 69.5%, of butanone 1,2-propanediol ketal is 78.5%, of 2-phenyl-1,3-dioxolane is 56.7%, of 4-methyl-2-phenyl-1,3-dioxolane is 86.2%, of 2-propyl-1,3-dioxolane is 87.5%, of 4-methyl-2-propyl-1,3-dioxolane is 87.9%.