A visible‐light‐induced trifluoromethylation of isonitrile‐substituted indole derivatives has been developed from the reaction of isonitrile‐substituted indoles with Togni II reagent, affording 1‐(trifluoromethyl)‐4,9‐dihydro‐3H‐pyrido[3,4‐b]indoles in moderate to good yields. The further transformations to β‐carboline derivatives and a harmacine derivative have been performed, demonstrating the potential synthetic utility of this method. A preliminary biological study indicated that the CF₃‐containing harmine analogue significantly stimulated the secretion of glucagon‐like peptide‐1 (GLP‐1), suggesting an improvement in treating diabetes.

中文翻译：

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可见光诱导的异腈取代的吲哚衍生物的三氟甲基化：获得1-（三氟甲基）-4,9-二氢-3H-吡啶并[3,4-b]吲哚和β-咔啉衍生物

的可见光诱导的异腈基取代的吲哚衍生物的三氟甲基化已经从与TOGNI II试剂异腈取代的吲哚的反应研制，得到1-（三氟甲基）-4,9-二氢-3- ħ -吡啶并[3,4 ‐b]吲哚产量中等至良好。已经进行了向β-咔啉衍生物和harmacine衍生物的进一步转化，证明了该方法的潜在合成效用。一项初步的生物学研究表明，含有CF ₃的harmine类似物可显着刺激胰高血糖素样肽1（GLP-1）的分泌，表明糖尿病的治疗有所改善。