Derivatives of Fluorene. IV. Raney Nickel-Hydrazine Hydrate Reduction of Various Mono- and Dinitrofluorene Derivatives; Some New 9-Substituted Fluorenes1
Radiation-Induced Polymerization of a Mono- and Diacrylate Studied Using a Fluorescent Molecular Probe
摘要:
Methyl methacrylate (MMA) and tetraethylene glycol diacrylate (TEGDA), containing less than 0.01 mol % 2-dimethylamino-7-nitrofluorene (DANF), have been polymerized using Co-60 gamma radiation. Changes occurring in the effective polarity of the materials during the course of polymerization were monitored as changes in the fluorescence wavelength and decay time of DANF using laser flash photolysis. The difference in polymerization rate, the effect of oxygen, and the occurrence of the Trommsdorff effect could be monitored.
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
Derivatives of Fluorene. IV. Raney Nickel-Hydrazine Hydrate Reduction of Various Mono- and Dinitrofluorene Derivatives; Some New 9-Substituted Fluorenes<sup>1</sup>