An unusual transformation of 5-acyl-1,2,4-triazines into 3-pyridyl-1,2,4-triazines via tandem Stille cross-coupling/aza Diels–Alder reaction
作者:Danuta Branowska、Olga Siuchta、Zbigniew Karczmarzyk、Waldemar Wysocki、Ewa Wolińska、Mariusz Mojzych、Robert Kawęcki
DOI:10.1016/j.tetlet.2011.10.034
日期:2011.12
A new route to 3-heteroaryl-1,2,4-triazines possessing a keto substituent at C-5 of the 1,2,4-triazine core using a Stille cross-coupling procedure and their unexpected ring transformation into pyridyltriazines as a result of enolization of an acyl group catalyzed by metal ions, are reported. (C) 2011 Elsevier Ltd. All rights reserved.