The Michael Reactions of Chloro-substituted-9,9′-bifluorenylidenes with Fluorenes and a Comparison with Analogous Halogen Compounds
作者:Masahiro Minabe、Kazuo Suzuki
DOI:10.1246/bcsj.48.586
日期:1975.2
The Michael reactions of 2-chloro- and 2,7-dichloro-9,9′-bifluorenylidenes with fluorenes were investigated. Structures of these products were confirmed by syntheses through the well-established reactions of 9-lithiofluorenes and 9-bromo-9,9′-bifluorenyls. The formation of some abnormal compounds is explained by intermediary formation of 2,7-dichloro-9,9′-bifluorenylidene from the reaction of 9,9′-bifluorenylidene
研究了 2-氯-和 2,7-二氯-9,9'-二芴基与芴的迈克尔反应。这些产物的结构通过 9-锂硫芴和 9-溴-9,9'-二芴基的成熟反应通过合成确认。一些异常化合物的形成可以通过 9,9'-二芴基与 2,7-二氯芴与溴代衍生物的反应中间形成 2,7-二氯-9,9'-二芴基来解释。相应的氟和碘系列主要产生正常的加成产物。这些差异是根据卤素取代基的感应和空间效应来解释的。