The Fischer indolisation (FI) typically proceeds in the presence of a Brønsted or Lewis acid in an organic solvent at elevated temperatures. Herein, we report that tetrahydrocarbazoles (THCs) are accessible by mechanochemical FI at ambient temperature. Using phenylhydrazine hydrochlorides in the presence of silica is critical for this solid-state variant of the FI.
费歇尔醛化反应(FI)通常在高温下在有机溶剂中在布朗斯台德酸或
路易斯酸存在下进行。在本文中,我们报道了四氢
咔唑(THCs)在环境温度下可通过机械
化学FI进入。在
二氧化硅的存在下使用苯
肼盐酸盐对于FI的这种固态变体至关重要。