Reaction of α-amido sulfones with functionalized nitrocompounds: a new two-step synthesis of <i>N</i>-alkoxycarbonyl-2,5-disubstituted pyrroles
作者:Roberto Ballini、Serena Gabrielli、Alessandro Palmieri、Marino Petrini
DOI:10.1039/c4ra08112a
日期:——
sulfones with nitro ketals promoted by KF on alumina provides the corresponding adducts which, upon treatment with p-toluenesulfonic acid, generate the corresponding N-alkoxycarbonyl-2,5-disubstituted pyrroles. The latter transformation involves a cascade process including ketal cleavage, ring closure and final aromatization by nitrous acid elimination.
由KF在氧化铝上促进的α-酰胺基砜与硝基
缩酮的反应提供了相应的加合物,其在用
对甲苯磺酸处理后产生相应的N-烷氧基羰基-2,5-二取代的
吡咯。后一种转化涉及级联过程,包括
缩酮切割,闭环和通过
亚硝酸消除而最终的芳构化。