Formation of 9,9′:9′,9″-Terfluorenyl Isomers Using Metalated Fluorenes as Synthetic Intermediates
作者:Masahiro Minabe、Kazuo Suzuki
DOI:10.1246/bcsj.48.1301
日期:1975.4
Rotational isomers of 9,9′: 9′,9″-terfluorenyl were obtained by the addition of 9-lithiofluorene to 9,9′-bifluorenylidene (III). 2,7-Dibromo- (VI) and 2,7,2″,7″-tetrabromo-9′,9″-terfluorenyl (VIII) resulted from similar reactions of the corresponding bromo-derivatives. 9-Lithio-9,9′-bifluorenyl was treated with 9-bromo-9,9′-bifluorenyl to give 9,9′-bis(9,9′-bifluorenyl) (X), 9,9′: 9′,9″-terfluorenyl
通过将 9-锂硫芴加成到 9,9'-二芴基 (III) 获得 9,9': 9',9"-三芴基的旋转异构体。2,7-Dibromo-(VI) 和 2,7,2",7"-tetrabromo-9',9"-terfluorenyl (VIII) 由相应溴代衍生物的类似反应产生。9-Lithio-9,9'-bifluorenyl 用 9-bromo-9,9'-bifluorenyl 处理得到 9,9'-bis(9,9'-bifluorenyl) (X), 9,9': 9' ,9"-三芴基异构体(mp 293 °C (dec) (I) 和 mp 257 °C (dec) (II))、9,9'-二芴基 (IX)、III 和芴酮。I 被金属钾异构化得到另一个旋转异构体 II,它分解成其组分 IX、III 和芴 (IV)。