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。