作者:Claire Nolan、Thorfinnur Gunnlaugsson
DOI:10.1016/j.tetlet.2008.01.077
日期:2008.3
The formation of the C3-symmetrical 2,11,20-triaza[3.3.3](2,6)pyridinophane 1 was undertaken with the aim of improving the synthesis of this highly desirable macrocycle, with the future aim of functionalizing 1 with amide pendent arms for the recognition of lanthanide ions. The synthesis of 1 involves the stepwise transformation of pyridine-2,6-dicarboxylic acid into two key intermediates; N,N-bis
进行C 3对称的2,11,20-三氮杂[3.3.3](2,6)吡啶并吡咯1的形成是为了改进这种非常理想的大环的合成,并计划将来用1官能化1。酰胺悬垂臂用于识别镧系离子。1的合成涉及将2,6-吡啶吡啶甲酸逐步转化为两个关键中间体; N,N-双[(6-羟甲基)吡啶-2-基]-对甲苯磺酰胺7和6-双[(氨基-对甲苯磺酰基)甲基]吡啶5。这两个中间体的大环化得到8,在三个甲苯磺酰基脱保护后由其形成1。