DABCO-catalyzed three-component reaction for the synthesis of naphtho[2,3-b]thiophene-4,9-diones
作者:Yun Liu、Wenhui Ge、Junwen Han、Youquan Zhu、Yanhui Shi、Hui Wu
DOI:10.1016/j.tetlet.2017.05.081
日期:2017.7
9-diones has been developed via DABCO-catalyzed three-component reaction of 1,4-naphthoquinone derivatives, α,β-unsaturated ketones and hydrated sodium sulfide. The reaction is initiated by sequential Michael additions of sodium sulfide to α,β-unsaturated ketone and of generated anion to 1,4-naphthoquinone derivative, followed by intramolecular oxidative cyclization and aromatization. Various functional groups
通过DABCO催化的1,4-萘醌衍生物,α,β-不饱和酮和水合硫化钠的三组分反应,已经开发了萘并[2,3 - b ]噻吩-4,9-二酮的有效合成方法。通过依次向α,β-不饱和酮中添加硫化钠,并向1,4-萘醌衍生物中生成阴离子,依次进行迈克尔的加成反应,然后进行分子内氧化环化和芳构化,来引发反应。在反应条件下,α,β-不饱和酮中的各种官能团得以存活,并且以高收率产生了萘并[2,3 - b ]噻吩-4,9-二酮。