作者:Ping Cheng、Wenjie Shao、Derrick L. J. Clive
DOI:10.1021/jo401892t
日期:2013.12.6
A general method is described for the synthesis of 1,3′-bipyrroles. The route involves constructing a pyrrole ring on the nitrogen of a substituted 1H-pyrrole, so as to generate the 1,3′-bipyrrole. In this approach the nitrogen of the starting pyrrole was alkylated with a special Michael acceptor having an allylic leaving group, and the product was then modified in such a way that the second pyrrole
描述了用于合成1,3'-联吡咯的通用方法。该途径涉及在取代的1 H-吡咯的氮上构建吡咯环,以产生1,3'-联吡咯。在这种方法中,用具有烯丙基离去基团的特殊迈克尔受体将起始吡咯的氮烷基化,然后将产物进行修饰,以使第二个吡咯环可以通过Paal-Knorr反应形成。检查了该序列的两个变体,其中一个导致形成3-羟基吡啶而不是第二个吡咯环。另一种变体使用苯甲酰溴代替特殊的迈克尔受体。