Effective microwave-assisted approach to 1,2,3-triazolobenzodiazepinones via tandem Ugi reaction/catalyst-free intramolecular azide–alkyne cycloaddition
作者:Maryna O Mazur、Oleksii S Zhelavskyi、Eugene M Zviagin、Svitlana V Shishkina、Vladimir I Musatov、Maksim A Kolosov、Elena H Shvets、Anna Yu Andryushchenko、Valentyn A Chebanov
DOI:10.3762/bjoc.17.57
日期:——
A novel catalyst-free synthetic approach to 1,2,3-triazolobenzodiazepinones has been developed and optimized. The Ugi reaction of 2-azidobenzaldehyde, various amines, isocyanides, and acids followed by microwave-assisted intramolecular azide–alkyne cycloaddition (IAAC) gave a series of target heterocyclic compounds in moderate to excellent yields. Surprisingly, the normally required ruthenium-based
开发并优化了一种新型 1,2,3-三唑并苯并二氮杂卓类化合物的无催化剂合成方法。 2-叠氮基苯甲醛、各种胺、异氰化物和酸的 Ugi 反应,然后进行微波辅助分子内叠氮-炔环加成 (IAAC),以中等至优异的收率生成了一系列目标杂环化合物。令人惊讶的是,通常所需的钌基催化剂被发现不会影响 IAAC,只会使目标化合物的分离变得更加困难,而微波辅助的无催化剂条件对末端和非末端炔烃均有效。