| 摘要 |
<p>5-Substituted pyrrolo[2,3-d]pyrimidines are prepared from a nucleophile of the formula R<2>-C(=NH)NH2 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-glut amic acid, by allowing guanidine and ethyl 4-[2-(2-amino-3-cyanofur-4-yl)ethyl]benzoate to react under mild conditions.</p> |
