Reactions of ketene dithioacetals with bis-nucleophiles: Synthesis of novel heterocyclic thiols
作者:John M Mellor、Stephen R Schofield、Stewart R Korn
DOI:10.1016/s0040-4020(97)10137-5
日期:1997.12
The reactions of hydroxylamine, hydrazines, thiourea and guanidines with ketene dithioacetals are reported. The chemo- and regioselective aspects of the synthesis of the heterocyclic thiol products are contrasted with recently described processes based on related alkene substrates.
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