Application of the intramolecular aza-Wittig reaction to the synthesis of pyrido[2,3-d]pyrimidines
作者:Johann Chan、Margaret Faul
DOI:10.1016/j.tetlet.2006.03.091
日期:2006.5
Pyrido[2,3-d]pyrimidines are synthesized in a two-step procedure from amides and tetrazolo[1,5-a]pyridine-8-carbonyl chloride. Reaction of the crude imides with triphenylphosphine effects an intramolecular aza-Wittig reaction to afford a variety of substituted pyrido[2,3-d]pyrimidines in good to moderate yields (30–76%).
吡啶并[2,3- d ]嘧啶是由酰胺和四唑并[1,5 - a ]吡啶-8-羰基氯经两步合成的。粗酰亚胺与三苯基膦的反应会引起分子内aza-Wittig反应,从而以良好至中等的收率(30–76%)提供各种取代的吡啶并[2,3- d ]嘧啶。