Brönsted acidic ionic liquid catalyzed synthesis of benzo[a]carbazole from renewable acetol and 2-phenylindoles in a biphasic system
作者:Minghao Li、Fengtian Wu、Yanlong Gu
DOI:10.1016/s1872-2067(19)63370-x
日期:2019.8
Abstract An efficient metal-free strategy for the synthesis of pharmaceutically relevant benzo[a]carbazoles from the derivatives of readily available 2-phenylindole and bio-renewable acetol in an aqueous biphasic system was developed. This protocol employed a sulfone-containing Bronsted acidic ionic liquid as the catalyst, which could be used for five times without a noticeable decrease in its activity
摘要 开发了一种有效的无金属策略,用于在水性双相系统中从易于获得的 2-苯基吲哚和生物可再生丙酮醇的衍生物合成与药学相关的苯并 [a] 咔唑。该方案采用含砜的布朗斯台德酸性离子液体作为催化剂,可以使用五次,其活性和选择性没有明显下降。各种取代的2-苯基吲哚和α-羟基酮顺利参与反应,唯一的副产物是水。从机制上讲,该反应涉及传统的碳亲核试剂诱导的 Heyns 型重排和下游分子内烯化。