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-withdrawingsubstituents 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