Tandem oxidation processes for the preparation of nitrogen-containing heteroaromatic and heterocyclic compounds
作者:Steven A. Raw、Cecilia D. Wilfred、Richard J. K. Taylor
DOI:10.1039/b315689c
日期:——
alpha-hydroxy ketones undergo manganese dioxide-mediated oxidation followed by in situ trapping with aromatic or aliphatic 1,2-diamines to give quinoxalines or dihydropyrazines, respectively, in a one-pot procedure which avoids the need to isolate the highly reactive dicarbonyl intermediates. The scope and limitations of these procedures are outlined and modifications to this procedure are discussed