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Functionalization of Aromatic Azo Compounds by the Cobalt‐Catalyzed, Regioselective Double Addition of Tolane: 2,6‐Distilbenylazobenzenes and 2,3‐Dihydrocinnolines
Author(s) -
Halbritter Günther,
Knoch Falk,
Wolski Alexander,
Kisch Horst
Publication year - 1994
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199416031
Subject(s) - diphenylacetylene , regioselectivity , cobalt , catalysis , photochromism , surface modification , chemistry , solvent , organic chemistry , combinatorial chemistry , polymer chemistry
The substitution pattern determines whether distilbenylazobenzene compounds 1 or their subsequent products, the dihydrocinnolines 2 , are isolated in the cobalt‐catalyzed solvent‐free reaction of azo compounds with diphenylacetylene. For several derivatives a photochromic equilibrium exists between the two forms.