Dearomatization Strategy for the Synthesis of Arylated 2<i>H</i>-Pyrroles and 2,3,5-Trisubstituted 1<i>H</i>-Pyrroles
作者:Peter Polák、Tomáš Tobrman
DOI:10.1021/acs.orglett.7b02219
日期:2017.9.1
first high-yielding route to arylated 2H-pyrroles was developed. The methodology utilizes 2,5-disubstituted pyrroles that are metalated, and the aryl substituents are introduced by a palladium-catalyzed cross-coupling reaction. The prepared pyrroles can be rearranged to 2,3,5-trisubstituted pyrroles under acidic conditions. Attempts to convert the 2,3,5-trisubstituted pyrroles to 2,3,4,5-tetrasubstituted
开发了第一个芳基化的2 H-吡咯高产路线。该方法利用金属化的2,5-二取代的吡咯,并且芳基取代基通过钯催化的交叉偶联反应引入。所制备的吡咯可以在酸性条件下重排为2,3,5-三取代的吡咯。通过脱芳香化重排策略将2,3,5-三取代的吡咯转化为2,3,4,5-四取代的吡咯的尝试均未成功。