An Efficient Route to Symmetrically and Unsymmetrically Substituted Azamacrocyclic Ligands
作者:Sonia Pulacchini、Michael Watkinson
DOI:10.1002/1099-0690(200111)2001:22<4233::aid-ejoc4233>3.0.co;2-l
日期:2001.11
An extremely efficient cyclisation protocol has been developed for the synthesis of symmetrically (6) and unsymmetrically substituted (7) derivatives of 1,4,7-triazacyclononane (2). The optimised conditions can be successfully applied to the synthesis of larger macrocycles 15a and 18a. In contrast, the protocol is not generally applicable with benzylamine, and the cyclic carbamates 16 and 19, rather
已开发出一种极其有效的环化方案,用于合成 1,4,7-三氮杂环壬烷 (2) 的对称 (6) 和非对称取代 (7) 衍生物。优化的条件可以成功地应用于合成更大的大环 15a 和 18a。相比之下,该协议通常不适用于苄胺,并且形成了环状氨基甲酸酯 16 和 19,而不是较大的氮杂大环,这表明使用 K2CO3 在 CH3CN 中的环化对 7 的形成具有高度特异性。