The catalytic reactions of indoles with CO₂ and phenylsilane afforded indolo[3,2-b]carbazoles, where the fused benzene ring was constructed by forming two C–H bonds and four C–C bonds with two CO₂ molecules via deoxygenative conversions. Nine-membered cyclophanes made up of three indoles and three CO₂ molecules were also obtained, where the cyclophane framework was constructed by forming six C–H bonds and six C–C bonds. These multicomponent cascade reactions giving completely different carbocycles were switched simply by choosing the solvent, acetonitrile or ethyl acetate.

中文翻译：

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碳环与 CO2 的骨架形成：从吲哚、CO2 和苯基硅烷选择性合成吲哚并[3,2-b]咔唑或环芬


吲哚与CO ₂ 和苯基硅烷的催化反应得到吲哚并[3,2-b]咔唑，其中稠合苯环是通过与两个CO形成两个C-H键和四个C-C键而构建的 ₂ 分子通过脱氧转化。还获得了由三个吲哚和三个CO ₂ 分子组成的九元环烷，其中环烷骨架是通过形成六个C-H键和六个C-C键构建的。这些产生完全不同碳环的多组分级联反应只需选择溶剂乙腈或乙酸乙酯即可进行切换。