β-Alkoxyvinyl trichloromethyl ketones as N-heterocyclic acylating agent. A new access to 5H-thiazolo[3,2-a]pyrimidin-5-ones
作者:Helio G Bonacorso、Rogério V Lourega、Arci D Wastowski、Alex F.C Flores、Nilo Zanatta、Marcos A.P Martins
DOI:10.1016/s0040-4039(02)02337-7
日期:2002.12
Using trichloromethyl substituent as convenient leaving group for the synthesis of interesting bi-heterocyclic compounds, a series of 6-methyl- and 7-alkyl(aryl)-5H-thiazolo[3,2-a]pyrimidin-5-ones, where alkyl=methyl, n-propyl, isopropyl, isobutyl, n-hexyl, isopentyl and aryl=phenyl, 4-toluyl, 4-chlorophenyl, 4-bromophenyl, 4-methoxyphenyl was obtained from a simple and regiospecific reaction of 4-alkoxy-1
使用三氯甲基取代基作为方便的离去基团,用于合成有趣的双杂环化合物,一系列6-甲基和7-烷基(芳基)-5 H-噻唑并[3,2- a ]嘧啶-5-酮,其中烷基=甲基,正丙基,异丙基,异丁基,正己基,异戊基和芳基=苯基,通过4-烷氧基-的简单和区域特异性反应获得4-甲苯基,4-氯苯基,4-溴苯基,4-甲氧基苯基。 1,1,1-三氯-3-烯丙基-2-酮与2-氨基噻唑的收率良好(45–89%)。