Microwave Promoted Simple, Efficient and Regioselective Synthesis of Trisubstituted Imidazo[1,2-<i>a</i>]benzimidazoles on Soluble Support
作者:Li-Hsun Chen、Ya-Shan Hsiao、Gorakh S. Yellol、Chung-Ming Sun
DOI:10.1021/co1000037
日期:2011.3.14
and soluble polymer-supported synthesis of medicinally important imidazole-fused benzimidazoles has been developed. The protocol involves the rapid condensation of polymer-bound amino benzimidazoles with various α-bromoketones and subsequent in situ intramolecular cyclization under microwave irradiation resulting in a one pot synthesis of imidazole interlacing benzimidazole polymer conjugates. The condensed
已经开发了有效的微波辅助和可溶性聚合物支持的医学上重要的咪唑融合的苯并咪唑类合成物。该方案涉及聚合物结合的氨基苯并咪唑与各种α-溴酮的快速缩合,随后在微波辐射下原位进行分子内环化,形成一锅合成的咪唑交联苯并咪唑聚合物共轭物。获得具有优异的区域选择性的缩合产物。具有生物学意义的咪唑并[1,2- a在环境温度下从聚合物载体中释放]苯并咪唑。三杂环核的多样性是通过在其2、3和9位的不同取代实现的。该新方案的优点是反应时间短,后处理容易,产率高,对环境的影响小,底物范围广,操作方便。