5-Substituted pyrrolo[2,3-d]pyrimidines are prepared from a nucleophile of the formula R.sup.2 -C(.dbd.NH)NH.sub.2 and a 2-amino-5-substituted-furan carrying a cyano or carboxy group in the 4-position. A typical example is the preparation of ethyl 4-(2-(2,4-diaminopyrrolo[2,3-d]pyrimidin-5-yl)ethyl}benzoate, an intermediate for the preparation of the known N-[4-2-(2,4-diaminopyrrolo[2,3-d]pyrimidin-5-yl)ethyl}benzoyl]-L-glutamic acid, by allowing guanidine and ethyl 4-[2-(2-amino-3-cyanofur-4-yl)ethyl]benzoate to react under mild conditions.
5-取代
吡咯并[2,3-d]
嘧啶可由
化学式为R.sup.2-C(.dbd.NH)NH.sub.2的亲核试剂和在4位带有
氰基或羧基的2-
氨基-5-取代
呋喃反应制备而成。一个典型的例子是通过在温和的条件下让
胍和
乙酸乙酯4-[2-(2-
氨基-3-
氰基
呋喃-4-基)乙基]苯酸酯反应制备出
乙酸乙酯4-(2-(2,4-二
氨基
吡咯并[2,3-d]
嘧啶-5-基)乙基)苯酸酯,这是制备已知的N-[4-2-(2,4-二
氨基
吡咯并[2,3-d]
嘧啶-5-基)乙基}苯甲酰]-
L-谷氨酸的中间体。