There is disclosed an improved process for the preparation of 10-deazaaminopterin and related compounds. In accordance with this process, 6-(bromomethyl)-2,4- pteridinediamine hydrobromide is reacted with triphenylphosphine to form a phosphonium salt which is then treated with a base to yield the corresponding ylid (2,4-diamino-6- pteridinyl)methylenetriphenylphosphorane. This compound is reacted with an aromatic aldehyde such as diethyl 4- formylbenzoyl-L-glutamate to form an olefin which is then reduced catalytically to the tetrahydro derivative of the desired product. Oxidation of the tetrahydro derivative is accomplished with hydrogen peroxide.
本发明公开了一种制备 10-脱氮
氨蝶呤及相关化合物的改进工艺。根据该工艺,6-(
溴甲基)-2,4-蝶啶二胺
氢溴酸盐与
三苯基膦反应生成
鏻盐,然后用碱处理生成相应的酰基(2,4-二
氨基-6-蝶啶基)亚甲基
三苯基膦。该化合物与芳香醛(如 4-甲酰基苯甲酰基-L-
谷氨酸二乙酯)反应生成烯烃,然后在催化下还原成所需产物的四氢衍
生物。四氢衍
生物的氧化是用
过氧化氢完成的。