2,6-DIARYLHEXAHYDRO-4-PYRIDAZINOLS BY ACID-CATALYZED CYCLIZATION OF BENZALDEHYDE ARYL-2-(2-PROPENYL)HYDRAZONES

Authors
BAKTHAVATCHALAM R CIGANEK E CALABRESE JC
Citation
R. Bakthavatchalam et al., 2,6-DIARYLHEXAHYDRO-4-PYRIDAZINOLS BY ACID-CATALYZED CYCLIZATION OF BENZALDEHYDE ARYL-2-(2-PROPENYL)HYDRAZONES, Journal of heterocyclic chemistry, 33(1), 1996, pp. 213-216
Citations number
8
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of heterocyclic chemistry → ACNP
ISSN journal
0022152X
Volume
33
Issue
1
Year of publication
1996
Pages
213 - 216
Database
ISI
SICI code
0022-152X(1996)33:1<213:2BACOB>2.0.ZU;2-I
Abstract
Treatment of benzaldehyde 1-(2-propenyl)-4-methylsulfonylphenylhydrazo ne (1f) with 45% sulfuric acid gave hylsulfonylphenyl)-6-phenylhexahyd ro-4-pyridazinol (2f) in 35% yield rather than the expected -(4-methyl sulfonylphenyl)-1-(2-propenyl)hydrazine. The halogen-substituted hydra zones 1c-1e and benzaldehyde 1-(2-methyl-2-propenyl)phenylhydrazone (1 b) gave similar results.