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Synthese von Benzofulvenen und Dibenzofulvenen über 1‐Chloralkyl‐acetate
Author(s) -
Neuenschwander Markus,
Vögeli Rudolf,
Fahrni HansPeter,
Lehmann Hans,
Ruder JeanPierre
Publication year - 1977
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19770600332
Subject(s) - chemistry , fulvene , sodium acetate , medicinal chemistry , sodium , organic chemistry , stereochemistry
Synthesis of benzofulvenes and dibenzofulvenes via 1‐chloroalkyl‐acetates 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 1‐chloroalkyl acetates (3) , followed by elimination with KOC(CH 3 ) 3 . 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.