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.
CLEMO N. G.; PATTENDEN G., J. CHEM. SOC. PERKIN TRANS.,(1986) N 12, 2133-2136
作者:CLEMO N. G.、 PATTENDEN G.
DOI:——
日期:——
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.
Routes to building blocks for heterocyclic synthesis by reduction of ketene dithioacetals
作者:John M Mellor、Stephen R Schofield、Stewart R Korn
DOI:10.1016/s0040-4020(97)10136-3
日期:1997.12
Two general methods have been developed permitting the effective reduction of ketene dithioacetals to give substituted dithianes. Reduction with magnesium in methanol is less reliable than reduction with zinc in acetic acid. The greater inconsistency of magnesium in methanol has been investigated by a cyclic voltammetric study of the substrates. The utility of the dithianes has been successfully illustrated