Expedient synthesis of a novel asymmetric selectively deprotectable derivative of the ATAC scaffold
作者:Arwin J. Brouwer、Helmus van de Langemheen、Rob M.J. Liskamp
DOI:10.1016/j.tet.2014.04.084
日期:2014.7
An efficient multigram scale synthesis of a new asymmetric triazacyclophane scaffold, the ATAC (Asymmetric-TAC) scaffold, bearing three selectively removable groups is described. This scaffold is slightly more rigid than our frequently used TAC (TriAzaCyclophane) scaffold. The synthesis of the required triamine is very high yielding without difficult steps or purifications and was also applied to a
描述了一种新型的不对称三氮杂杂环烷骨架,ATAC(Asymmetric-TAC)骨架,带有三个可选择性去除的基团的高效多克级合成。该支架比我们经常使用的TAC(TriAzaCyclophane)支架刚性更高。所需三胺的合成产率很高,无需困难的步骤或纯化,也可用于我们原始TAC支架的大大改进的合成。尤其是繁琐的第一反应步骤,即,单- Ô三胺的NBS-保护可以省略。还使用可变温度1 H NMR实验研究了TAC-和ATAC支架中三氮杂环烷环的刚度。