methyllithium in the presence of ethyl vinyl ether. A cyclopropane derivative was not obtained from the reaction of 9,9-dibromofluorene (III) or 9,9-dichloro-9H-tribenzo[a.c.e]cycloheptene (IV) with alkyllithium in olefin but 9,9′-bifluorenylidene (IX) and 9,9′-dibromo-9,9′-bifluorenyl (XI) were produced from III and 9-methylene-9H-tribenzo[a.c.e]cycloheptene (XXIII) and 9H-tribenzo-[a.c.e]-cyclohepten-9-ol
ALIPHATIC CHEMISTRY OF FLUORENE: PART II. AN UNUSUAL GRIGNARD REACTION
作者:P. M. G. Bavin
DOI:10.1139/v60-125
日期:1960.6.1
The reaction between methyl 9-methylfluorene-9-carboxylate and phenyl magnesium iodide gave 9,9′-dimethyl-9,9′-difluorenyl in almost quantitative yield. Evidence is presented which shows that 9-methylfluorene anion is an intermediate. The probable intervention of elemental iodine is discussed.9-Methyl-9,9′-difluorenyl and 9,9′-dimethyl-9,9′-difluorenyl have been synthesized. A convenient preparation