Synthesis of 6-Substituted 6<i>H</i>-Indolo[2,3-<i>b</i>]quinolines from Isoindigos
作者:Ling Fan、Meilin Liu、Yu Ye、Guodong Yin
DOI:10.1021/acs.orglett.6b03484
日期:2017.1.6
A facile approach to 6-aryl/alkyl substituted 6H-indolo[2,3-b]quinolinesfrom mono-N-substituted isoindigo derivatives in the presence of SnCl2·2H2O in acid media is described. Pyrrole and pyridine rings are synchronously constructed in one pot for these tetracyclic molecules. A plausible reduction/hydrolysis/decarboxylation/cyclization/aromatization domino reaction mechanism is proposed. Bis-N-substituted
描述了在SnCl 2 ·2H 2 O的存在下,在酸性介质中从单-N-取代的异靛蓝衍生物中6-芳基/烷基取代的6 H-吲哚并[2,3- b ]喹啉的简便方法。对于这些四环分子,吡咯和吡啶环在一个罐中同步构建。提出了合理的还原/水解/脱羧/环化/芳构化多米诺反应机理。双-N-取代的异靛蓝仅产生相应的还原产物3,3'-bioxindole。