A facile and practical method for the stereospecific synthesis of α-oxoketene O,S-acetals in water has been developed. Catalyzed by tetrabutylammonium bromide at room temperature, the one-pot reaction of various β-dicarbonyl compounds, 2-bromoethanol, and carbon disulfide, in the presence of potassium carbonate, leads to the corresponding α-oxoketene O,S-acetals stereospecifically in good to excellent
A Clean, Facile and Practical Synthesis of α-OxoketeneS,S-Acetals in Water
作者:Yan Ouyang、Dewen Dong、Haifeng Yu、Yongjiu Liang、Qun Liu
DOI:10.1002/adsc.200505331
日期:2006.1
A clean, facile and practical synthesis of α-oxoketene S,S-acetals in water has been developed. Catalyzed by tetrabutylammonium bromide (TBAB) at room temperature in water, a range of β-dicarbonyl compounds have been converted to the corresponding α-oxoketene S,S-acetals in very high yields. The catalyst in the aqueous phase can be recycled after the separation of organic products.
The iododecarboxylation reactions of alpha-carboxy ketene dithioacetals were presented. The alpha-iodo ketene dithioacetals 3 and alpha,alpha-diiodo ketene dithioacetals 4 were prepared in excellent yields simply from reactions of alpha-carboxy ketene dithioacetals 2 with iodine in aqueous media.
Shu-Jia; Qun; Yao-Zu, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2000, vol. 39, # 2, p. 147 - 150
作者:Shu-Jia、Qun、Yao-Zu
DOI:——
日期:——
Chou, Shin-Shou; Taniguchi, Eiji; Eto, Morifusa, Agricultural and Biological Chemistry, 1980, vol. 44, # 9, p. 2169 - 2178