Synthesis of Purines and Other Fused Imidazoles from Acyclic Amidines and Guanidines
作者:Bruce G. Szczepankiewicz、Jeffrey J. Rohde、Ravi Kurukulasuriya
DOI:10.1021/ol0504751
日期:2005.4.1
[reaction: see text] Purines, xanthines, and other fused imidazoles can be prepared from amidines or guanidines, with retrosynthetic disconnection at the ring fusion. Ring closure proceeds using Cu(I), with no special ligands required. The method allows for easy modification of the heterocyclic nucleus and is tolerant of functionality pendant to the ring system.
[反应:见正文]嘌呤,黄嘌呤和其他稠合的咪唑可以由am或胍制备,并在环融合时逆合成断开。闭环使用Cu(I)进行,不需要特殊的配体。该方法允许容易地修饰杂环核并且耐受环系统的功能性侧基。