Cascade Wolff Rearrangement and Double <i>N</i>‐Acylation: A Cyclization of <i>α</i>‐Diazoketones with 2‐aminopyridines or 3‐aminopyrazoles to Synthesize Fused Pyrimidinediones
A cascade Wolffrearrangement and double N-acylation reaction has been developed for the synthesis of fused pyrimidinediones in one-pot under air. These reactions were performed with α-diazoketones and 2-aminopyridines or 3-aminopyrazoles under catalyst- and additive-free conditions. The protocol avoided traditional purification procedures, such as organic solvent extraction and column chromatography
Solvent-free microwave synthesis of novel 6-hydroxypyrimidin-4(1H)-one derivatives using arylmalonates
作者:Stephanie M. Chichetti、Sean P. Ahearn、Bruce Adams、Alexey Rivkin
DOI:10.1016/j.tetlet.2007.08.134
日期:2007.11
The disclosure herein describes the rapid synthesis of novel 6-hydroxypyrimidin-4(1H)-one derivatives via a solvent-freemicrowave cyclocondensation reaction using di-(2,4,6-trichlorophenyl)malonates and a variety of heterocyclic amines.