Octa- and Nonamethylfluorene and an Electron-Rich Permethylfluorenyl Ruthenocene Derivative
作者:Patrick Bazinet、Karl A. Tupper、T. Don Tilley
DOI:10.1021/om0603464
日期:2006.8.1
Two highly methylated fluorene derivatives have been synthesized and used for the preparation of mixed-ligand fluorenyl ruthenocenes. Specifically, reaction of 2,2‘,3,3‘,4,4‘,5,5‘-octamethylbiphenyl with paraformaldehyde in the presence of CF3CO2H provided 1,2,3,4,5,6,7,8-octamethylfluorene (C13Me8H2), which was subsequently methylated by reaction with n-BuLi followed by addition of MeI to yield 1
已经合成了两种高度甲基化的芴衍生物,并将其用于制备混合配体芴基钌烯。具体而言,在CF 3 CO 2 H存在下2,2',3,3',4,4',5,5'-八甲基联苯与低聚甲醛的反应得到1,2,3,4,5,6,7 1,8-八甲基芴(C 13 Me 8 H 2),随后与正丁基锂反应,然后添加MeI进行甲基化,得到1,2,3,4,5,6,7,8,9-九氨基芴( C 13 Me 9 H)。芴基锂衍生物与[Cp * RuCl] 4的反应生成了混合配体钌烯the Cp *(C 13 Me 8H)Ru和Cp *(C 13 Me 9)Ru。电化学测量表明,这些钌茂茂衍生物在低电势下经历准可逆氧化,这与高度甲基化的芴基配体的强供电性相一致。在C 13 Me 8 H 2,C 13 Me 9 H和Cp *(C 13 Me 9)Ru上进行的X射线衍射研究表明,在所有情况下,芴核都扭曲了。