申请人:The Trustees of Princeton University
公开号:US05254687A1
公开(公告)日:1993-10-19
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。