A novel stepwise and regioselective nucleophilic aromatic substitution (SNAr) reaction of halogenated boron dipyrrins (BODIPYs) with pyrroles has been developed under mild conditions with no catalyst needed and shown to be diversity oriented. The resultant pyrrole-substituted BODIPYs are interesting red and near-infrared (NIR) fluorescent dyes with absorption maxima up to 733 nm. Removal of the BF2
在温和的条件下,无需催化剂就可以开发出卤化的硼联吡啶(BODIPYs)与吡咯的新型逐步和区域选择性亲核芳香取代(S N Ar)反应,并且该反应具有多样性。所得的吡咯取代的BODIPYs是有趣的红色和近红外(NIR)荧光染料,其吸收最大值高达733 nm。除去3-吡咯或3,5-二吡咯取代的BODIPY的BF 2保护基使面部直接进入具有直接2,2′-联吡咯键的寡吡咯。
Rhodium-Catalyzed [5 + 2] Annulation of Pyrrole Appended BODIPYs: Access to Azepine-Fused BODIPYs
作者:Hui Shu、Mengjie Guo、Machongyang Wang、Shuibo Fan、Mingbo Zhou、Ling Xu、Yutao Rao、Atsuhiro Osuka、Jianxin Song