Synthesis of Orthogonally Protected Angular Nitrogen Polyheterocycles via CpCo-Catalyzed Pyridine Formation
作者:Max Malacria、Vincent Gandon、Corinne Aubert、Yves Miclo、Pierre Garcia、Yannick Evanno、Pascal George、Mireille Sevrin
DOI:10.1055/s-0030-1258041
日期:2010.9
Co-catalyzed [2+2+2] cycloaddition of two alkynes to one nitrile. They exhibit two nitrogen-containing rings fused in an angular fashion to one pyridine unit. Several relative positions of the nitrogen atoms have been studied, giving rise to eight different new scaffolds. In order to allow selective functionalization of the two amino groups, orthogonal protecting groups (PG' and PG 2 ) were introduced prior
通过两个炔烃与一个腈的分子内共催化 [2+2+2] 环加成反应,制备了前所未有的含氮多杂环化合物。它们表现出两个含氮环以有角度的方式与一个吡啶单元稠合。已经研究了氮原子的几个相对位置,产生了八种不同的新支架。为了允许两个氨基的选择性官能化,在环化之前引入正交保护基团(PG'和PG 2 )。测试了七种不同保护基团(Bn、COCF 3 、Cbz、Boc、Ts、SO 2 -2-py、Ns)的十一种组合,其中大多数在环化条件下完全耐受。