A novel access to pyrido[4,3-d]pyrimidine scaffold via Staudinger/intramolecular aza-Wittig reaction of 5-acyl-4-(β-azidoalkyl)-1,2,3,4-tetrahydropyrimidin-2-ones
作者:Anastasia A. Fesenko、Anatoly D. Shutalev
DOI:10.1016/j.tet.2014.06.128
日期:2014.9
3-d]pyrimidin-2-ones via Staudinger/intramolecular aza-Wittig reaction of 5-acyl-4-(β-azidoalkyl)-1,2,3,4-tetrahydropyrimidin-2-ones promoted by PPh3 was developed. Synthesis of the starting pyrimidinones included preparation of 3-azidoaldehydes by the addition of hydrazoic acid to α,β-unsaturated aldehydes, transformation of 3-azidoaldehydes into N-[(3-azido-1-tosyl)alkyl]ureas followed by the reaction with enolates
一般四步的方法来1,2,3,7,8,8a六氢吡啶并[4,3- d ]通过施陶丁格的5-酰基-4- /分子内氮杂Wittig反应嘧啶-2-酮(β-开发了由PPh 3促进的叠氮基烷基)-1,2,3,4-四氢嘧啶-2-酮。起始嘧啶酮类化合物的合成包括通过向α,β-不饱和醛中添加氢氰酸制备3-叠氮醛,将3-叠氮醛转化为N -[(3-叠氮基-1-甲苯基)烷基]脲,然后进行反应。用二苯甲酰基甲烷,苯甲酰基丙酮,乙酰丙酮或2,4-二氧代-4-苯基丁酸乙酯的烯醇化物和所得产物在酸性条件下脱水。