[5C + 1C/N/S/Se] Annulations of α-Alkenoyl-α-carbamoylketene Dithioacetals: A Facile and Convenient Synthesis of Salicylamide, Nicotinamide and Thio/Selenopyran-3-carboxamide Derivatives
作者:Xianxiu Xu、Qun Liu、Dongwei Li、Song Dong
DOI:10.1055/s-2008-1067081
日期:——
Rapid access to pharmaceutically important scaffolds, including salicylamides, dihydronicotinamides and dihydrothio/dihydroselenopyran--3-carboxamides, are described. The [5+1]-annulation- reactions of α-alkenoyl-α-carbamoylketene dithioacetals with carbon, nitrogen, sulfur and selenium nucleophiles give the title- compounds in high yields under mild conditions.