Visible light-mediated, rose Bengal-catalyzed oxidative radical C H cyclization of alkyl 1,1′-biaryl-2-ones: An efficient synthesis of 10-alkylphenanthren-9-ols in water
作者:Palani Natarajan、Naveen Kumar、Renu Chaudhary、Paloth Venugopalan
DOI:10.1016/j.tetlet.2020.151823
日期:2020.4
(blue LED: λ= 455±10 nm), rose bengal-catalyzed intramolecular cycloaromatization reaction of alkyl 1, 1’-biaryl-2-ones for the synthesis of 10-alkylphenanthren-9-ols in water under open air atmosphere at ambient conditions has been developed. Experimental studies demonstrate that the reaction proceeded via a radical pathway. This protocol is applicable to a wide variety of substrates giving expected
可见光介导的(蓝色LED:λ= 455±10 nm),玫瑰孟加拉催化的烷基1,1'-联芳基-2-酮的玫瑰孟加拉催化的分子内芳环化反应,用于在水中在10-A的条件下合成10-烷基菲蒽9-醇。已经开发出在环境条件下的露天气氛。实验研究表明,该反应通过自由基途径进行。与文献报道的制备菲咯啉衍生物的方法相比,该方案适用于各种底物,可提供预期的10-烷基菲咯啉9-醇,收率良好,适用于克级合成,原子经济和生态友好。而且,据我们所知,迄今为止,尚无关于可见光诱导的容易获得的烷基1,1'-联芳基-2-酮向10-烷基菲蒽-9-醇的转化的实例。