Sequential Regioselective Diorganochalcogenations of Imidazo[1,2-<i>a</i>]pyrimidines Using I<sub>2</sub>/H<sub>3</sub>PO<sub>4</sub> in Dimethylsulfoxide
作者:Anne Roly Obah Kosso、Youssef Kabri、Julie Broggi、Sébastien Redon、Patrice Vanelle
DOI:10.1021/acs.joc.9b02963
日期:2020.3.6
The dichalcogenation of imidazoheterocycles led to the first functionalization of imidazo[1,2-a]pyrimidine cores on the C6-position. The methodology, involving iodine/dimethylsulfoxide oxidation of diaryldichalcogenides, started with C3-chalcogenation, followed by C6 selanylation, activated in acidic medium. This novel sequential dichalcogenation strategy proceeded efficiently with excellent regioselectivity
咪唑杂环的二卤代化作用导致咪唑[1,2-a]嘧啶核在C6-位上首次官能化。该方法涉及碘化二芳基二卤化碘的碘/二甲基亚砜,该方法首先在酸性介质中活化C3-硫属元素化,然后进行C6硒基化。这种新颖的顺序二硫代化策略以优异的区域选择性和产率有效进行。