作者:Jacqueline Marchand-Brynaert、Frédéric Bruyneel
DOI:10.1055/s-0030-1258494
日期:2010.8
The efficient synthesis of sulfonylated benzoxazoles at positions C4 or C7 is reported. The condensation reactions involve original anilide acetal reagents which, upon acid catalysis, allow an easy cyclization reaction with the sulfonylated o-aminophenol partners. This method circumvents the classical use of orthoesters which drawback is the limited access to aromatic reagents.
报道了在 C4 或 C7 位磺酰化苯并恶唑的有效合成。缩合反应涉及原始的苯胺缩醛试剂,在酸催化下,可以与磺酰化的邻氨基苯酚伙伴进行轻松的环化反应。这种方法规避了原酸酯的经典使用,其缺点是获得芳族试剂的途径有限。