Synthese von Benzofulvenen und Dibenzofulvenen über 1??Chloralkyl??acetate

M Neuenschwander, R Vögeli, HP Fahrni…

Index: Neuenschwander,M. et al. Helvetica Chimica Acta, 1977 , vol. 60, p. 1073 - 1086

Full Text: HTML

Citation Number: 31

Abstract

Summary 1, 2-Benzofulvene (6a) and 1, 2, 3, 4-dibenzofulvene (7a) as well as the corresponding 6-methyl-and 6-phenyl-derivatives are prepared by reaction of sodium indenide and sodium fluorenide with l-chloroalkyl acetates (3), followed by elimination with KOC (CH,),. The over-all yields are comparable with the results of the fulvene series and are in most cases considerably higher than the yields of the Thiele-method.