Regioselective Synthesis of Unsymmetric Tetra- and Pentasubstituted Pyrenes with a Strategy for Primary <i>C</i>-Alkylation at the 2-Position
作者:Ana M. Dmytrejchuk、Sydney N. Jackson、Rolande Meudom、John D. Gorden、Bradley L. Merner
DOI:10.1021/acs.joc.8b01491
日期:2018.9.7
The synthesis of 1,2,4,5- and 1,2,9,10-tetrasubstituted and 1,2,4,5,8-pentasubsutituted pyrenes has been achieved by initially functionalizing the K-region of pyrene. Bromination, acylation, and formylation reactions afford high to moderate levels of regioselectivity, which facilitate the controlled introduction of other functional groups about 4,5-dimethoxypyrene. Access to 4,5-dimethoxypyren-1-ol
1,2,4,5-和1,2,9,10-四取代的和1,2,4,5,8-五取代的pyr的合成已通过首先官能化of的K-区来实现。溴化,酰化和甲酰化反应提供了高至中等水平的区域选择性,这有助于控制引入约4,5-二甲氧基py的其他官能团。获得4,5-二甲氧基吡啶-1-醇和9,10-二甲氧基吡啶-1-醇使得a的罕见的C-2伯烷基取代成为可能。