作者:Karlheinz Geisler、Peter Langer、Andreas Künzler、Harald Below、Ehrenfried Bulka、Wolf-Diethard Pfeiffer
DOI:10.1055/s-2003-44348
日期:——
2-Acyl-1,3-selenazoles were prepared in two steps from α-bromoketones and seleno amides. The base mediated fragmentation of these compounds afforded 2-unsubstituted 1,3-selenazoles. The reaction of 2-acyl-1,3-selenazoles with hydroxylamine hydrochloride afforded oximes which were transformed into 2-carbamoyl-1,3-selenazoles by a regioselective Beckmann rearrangement.
2-酰基-1,3-硒氮杂环化合物通过α-溴酮和硒酰胺的两步反应合成。这些化合物在碱的介导下发生断裂,生成2-未取代的1,3-硒氮杂环化合物。2-酰基-1,3-硒氮杂环化合物与盐酸羟胺反应生成肟,然后通过选择性贝克曼重排转化为2-氨基甲酰-1,3-硒氮杂环化合物。