Brønsted acid catalyzed intramolecular benzylic cyclizations of alkylpyridines
作者:Ashabha I. Lansakara、Daniel P. Farrell、F. Christopher Pigge
DOI:10.1039/c3ob42039f
日期:——
incorporated into the side chains of 2- and 4-alkylpyridines participate in intramolecular aldol-like condensations with pyridine benzylic carbons in the presence of Brønstedacid catalysts. Pyridines featuring β-ketoamide side chains undergo cyclization in the presence of 10 mol% TfOH to afford pyridyl-substituted hydroxy lactams in good yield. These products were found to be resistant to further dehydration