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Fluorénacènes et fluorénaphènes synthèses dans la série des indéno‐fluorènes, XVII . Dérivés méthylés du cis ‐fluorénacène, du trans ‐fluorénacène et du trans ‐fluorénaphène
Author(s) -
Chardonnens Louis,
Laroche Bernard,
Sieber Willy
Publication year - 1974
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.19740570312
Subject(s) - chemistry , fluorene , medicinal chemistry , benzoic acid , condensation , stereochemistry , organic chemistry , polymer , physics , thermodynamics
By condensation of the chlorides of the three 9‐oxo‐fluorene‐2‐, ‐3‐, and ‐4‐carboxylic acids with 4‐bromo‐1,2‐xylene on one side, and of the chlorides of o ‐bromobenzoic acid, 2‐bromo‐4‐methyl‐benzoic acid and 2‐bromo‐4,5‐dimethyl‐benzoic acid with fluorene, 2‐methylfluorene and 3‐methylfluorene on the other side, followed by direct or indirect cyclisation and by final reduction, several new methyl derivatives of the indenofluorenes I, II and IV are synthesized.