Allylic and Allenylic Dearomatization of Indoles Promoted by Graphene Oxide by Covalent Grafting Activation Mode
作者:Lorenzo Lombardi、Daniele Bellini、Andrea Bottoni、Matteo Calvaresi、Magda Monari、Alessandro Kovtun、Vincenzo Palermo、Manuela Melucci、Marco Bandini
DOI:10.1002/chem.202001373
日期:2020.8.17
The site‐selective allylative and allenylative dearomatization of indoles with alcohols was performed under carbocatalytic regime in the presence of graphene oxide (GO, 10 wt % loading) as the promoter. Metal‐free conditions, absence of stoichiometric additive, environmentally friendly conditions (H2O/CH3CN, 55 °C, 6 h), broad substrate scope (33 examples, yield up to 92 %) and excellent site‐ and
在碳催化作用下,在氧化石墨烯(GO,10 wt%负载)作为促进剂的情况下,用醇对吲哚进行位点选择性烯丙基和烯丙基脱芳香化反应。无金属的条件,无化学计量的添加剂,环境友好的条件(H 2 O / CH 3 CN,55°C,6 h),广泛的底物范围(33个实例,产率高达92%)以及出色的定点和立体选择性目前的方法。此外,GO功能发挥的共价激活模型得到了光谱,实验和计算证据的证实。还记录了通过简单的酸性处理来回收和再生GO催化剂。