Synthesis of Polyheterocyclic Pyrrolo[3,4-b]pyridin-5-ones via a One-Pot (Ugi-3CR/aza Diels-Alder/N-acylation/aromatization/SN2) Process. A Suitable Alternative towards Novel Aza-Analogues of Falipamil
作者:Angel Zamudio-Medina、Ailyn García-González、Genesis Herrera-Carrillo、Daniel Zárate-Zárate、Adriana Benavides-Macías、Joaquín Tamariz、Ilich Ibarra、Alejandro Islas-Jácome、Eduardo González-Zamora
DOI:10.3390/molecules23040763
日期:——
We describe the one-pot synthesis of twenty polyheterocyclic pyrrolo[3,4-b]pyridin-5-ones via a cascade process (Ugi-3CR/aza Diels-Alder/N-acylation/aromatization) in 20 to 95% overall yields, as well as four pharmacologically promising analogues via an improved cascade process (Ugi-3CR/aza Diels-Alder/N-acylation/aromatization/SN2): two piperazine-linked pyrrolo[3,4-b]pyridin-5-ones in 33 and 34%
我们描述了通过级联过程(Ugi-3CR / Aza Diels-Alder / N-酰化/芳构化)以20%至95%的总产率一锅合成二十个多杂环吡咯并[3,4-b]吡啶基-5-酮,以及通过改进的级联过程(Ugi-3CR / Aza Diels-Alder / N-酰化/芳香化/ SN2)得到的四个在药理上有希望的类似物:两个哌嗪连接的吡咯并[3,4-b]吡啶-5-酮33%和34%,以及几个Falipamil氮杂类似物,总产率为30%和35%。值得一提的是,发现了良好的底物范围,因为最终产品配有烷基,芳基和杂环取代基。使用链环可互变异构异氰酸酯(作为Ugi型三组分反应的关键试剂)可以快速有效地组装多取代的羟吲哚,这些化合物原位用于复杂的产品,