Total Synthesis of Dictyodendrins by the Gold-Catalyzed Cascade Cyclization of Conjugated Diynes with Pyrroles
作者:Junpei Matsuoka、Yuka Matsuda、Yuiki Kawada、Shinya Oishi、Hiroaki Ohno
DOI:10.1002/anie.201703279
日期:2017.6.19
In total and formal syntheses of dictyodendrins B, C, E, and F, the key step involved the direct construction of the pyrrolo[2,3‐c]carbazole core by the gold‐catalyzed annulation of a conjugated diyne with a pyrrole to form three bonds and two aromatic rings. The subsequent introduction of substituents at the C1 (Suzuki–Miyaura coupling), C2 (addition to an aldehyde), N3 (alkylation), and C5 positions
在双脱硫木糖醇B,C,E和F的全部和形式合成中,关键步骤涉及通过金催化的共轭二炔与吡咯的环化反应直接构建吡咯并[2,3- c ]咔唑核三个键和两个芳香环。随后在C1(Suzuki-Miyaura偶联),C2(加成醛),N3(烷基化)和C5位置(乌尔曼偶联)处引入取代基提供了不同的途径获得十碳五苯醚。