Palladium-Catalyzed Direct (Hetero)arylation of Ethyl Oxazole-4-carboxylate: An Efficient Access to (Hetero)aryloxazoles
作者:Cécile Verrier、Thibaut Martin、Christophe Hoarau、Francis Marsais
DOI:10.1021/jo801093n
日期:2008.9.19
toward 2-(hetero)arylated and 2,5-di(hetero)arylated oxazoles through regiocontrolled palladium-catalyzed direct (hetero)arylation of ethyl oxazole-4-carboxylate with iodo-, bromo-, and chloro(hetero)aromatics followed by a two-step hydrolysis/decarboxylation sequence was described. The method was applied here to a neat synthesis of two 2,5-di(hetero)aryloxazole natural products, balsoxin and texaline
通过区域控制的钯催化的恶唑-4-羧酸乙酯与碘,溴和氯(杂)的直接(杂)芳基化反应,生成2-(杂)芳基化和2,5-二(杂)芳基恶唑的直接途径描述了芳族化合物,随后是两步水解/脱羧序列。该方法在这里用于两种2,5-二(杂)芳基恶唑天然产物balsoxin和texaline的纯净合成。