Optimization of the Suzuki coupling reaction in the synthesis of 2-[(2-substituted)phenyl]pyrrole derivatives
作者:Marija Alešković、Nikola Basarić、Kata Mlinarić-Majerski
DOI:10.1002/jhet.792
日期:2011.11
A facile three‐step synthesis of 2‐(2‐aminophenyl)pyrrole (1) and 2‐[(2‐aminomethyl)phenyl]pyrrole (2) is reported by use of Suzuki coupling of N‐Boc‐pyrrol‐2‐yl boronic acid (3) and o‐substituted aryl halogenides, followed by hydrogenation. The Pd‐catalyzed cross‐coupling reaction is optimized to be applicable to a wide range of substitued aryl halogenides, with electron‐donating and electron‐withdrawing
据报道,通过N -Boc-吡咯-2-基的Suzuki偶联,可以轻松实现三步合成2-(2-氨基苯基)吡咯(1)和2-[((2-氨基甲基)苯基]吡咯(2)。硼酸(3)和邻位取代的芳基卤化物,然后氢化。对Pd催化的交叉偶联反应进行了优化,以适用于具有电子给体和吸电子取代基5a,5b,5c,5d,5e,5f,5g的广泛取代的芳基卤化物。此外,邻溴代苯胺和3的Pd催化偶联可用于吡咯并[1,2 - c ]喹唑啉-5(6 H)-一(8)的一步制备。J.杂环化学。(2011)。