Synthesis of Alkylated Aminofluorenes by Palladium-Catalyzed Substitution at Halofluorenes
作者:Ginagunta Saroja、Zhang Pingzhu、Nikolaus P. Ernsting、Jürgen Liebscher
DOI:10.1021/jo035204n
日期:2004.2.1
New N-substituted 2-amino-9,9-dialkylfluorenes optionally bearing electron-withdrawing substituents such as nitro or cyano in position 7 can be synthesized starting from 2-halo-9,9-dialkylfluorenes by Pd-catalyzed substitution with amines. Chiral amino groups can be introduced by this method too. 2-N,N-Dimethylamino-7-nitro-9H-fluorene was obtained in a convenient way by reductive amination. The N-substituted
新的N-取代的2-氨基-9,9-二烷基芴基可任选地在7位带有吸电子取代基,如硝基或氰基,可通过2-Pd催化的胺取代反应从2-卤代的9,9-二烷基芴开始合成。手性氨基也可以通过这种方法引入。2- Ñ,Ñ二甲基氨基-7-硝基-9- ħ在一个方便的方法通过还原胺化得到的芴。所述Ñ取代的2-氨基-7-硝基9H -fluorenes是有希望的荧光探针,用于飞秒溶剂化动力学的候选者。