作者:Ana Paula da Rocha Pissurno、Rosangela da Silva de Laurentiz
DOI:10.1080/00397911.2017.1354380
日期:2017.10.18
An efficient, catalyst-free, microwave-assisted approach has been developed for the synthesis of 4-azo-butyenolides derivatives by condensing tetronic acid with various anilines. This approach exhibited good functional group compatibility and produced the desired products in good to excellent yields in just 30-40min. This approach can be seen as a better alternative to protocols with long reaction times used for the synthesis of these compounds, which are synthons for the obtaining of quinolines.[GRAPHICS].
A facile synthesis of the 4-aza-analogs of 1-arylnaphthalene lignans chinensin, justicidin B, and Taiwanin C
tetronic acid (2) or 1,3-cyclopentanedione (3) produced anilinolactones 4a-d and anilinocyclopentenone 5a, respectively, which were then condensed with benzaldehydes to yield 4-aza-1-arylnaphthalene lignan analogs 6–19.