Premium
Palladium‐promoted Cyclization of Tetra‐alkylated 1‐Arylazonaphthalenes to 2‐Aryl‐benzo[ g ]indazoles
Author(s) -
Hugentobler Max,
Klaus Alfred J.,
Ruppen Peter,
Rys Paul
Publication year - 1984
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.19840670114
Subject(s) - chemistry , palladium , catalysis , tetra , alkylation , aryl , medicinal chemistry , sodium , stereochemistry , organic chemistry , alkyl
1‐Arylazonaphthalenes with all the potential cyclopalladation sites (one peri ‐ and three ortho ‐positions) substituted by methyl or ethyl groups react with stoicheiometric or catalytic amounts of sodium tetrachloropalladate(II) to the corresponding 2‐arylbenzo[ g ]indazoles. Possible mechanisms for the catalytic cyclization reaction are proposed.