The Preparation of Ketene Dithioacetals and Thiophenes from Chloropyridines Containing an Active Methylene Group
作者:Keith R. Sturrock、David H. Bremner、Grant Wishart
DOI:10.3987/com-10-s(e)59
日期:——
appropriately functionalized ketene dithioacetals with base allows entry into a range of highly substituted heterocycles. In this work, haloalkanes with electron withdrawing groups on the same carbon as the halogen were employed as alkylating agents in the base catalysed nucleophilic addition reaction of 4 and 7 with carbon disulphide. This gave ketene dithioacetals with the required functionality for cyclisation