A Convenient and Facile Synthetic Method for 5-Chloro-4-pyridazinones
作者:Yasuhiro Kamitori、Masaru Hojo、Ryōichi Masuda、Kazuyoshi Kawasaki、Shigeru Takata、Junya Ida
DOI:10.1055/s-1990-26906
日期:——
Substituted benzaldehyde, benzaldehyde and propanal tert-butyl(methyl)hydrazones were successfully acylated with trichloroacetyl chloride to afford 3-unsubstituted and 3-aryl-3-tert-butyl(methyl)hydrazono-1,1,1-trichloro-2-alkanones 2. Several 3-alkyl- or 3-aryl-1-tert-butyl-5-chloro-4-pyridazinones 4 were synthesized in good yields by thermally induced cyclization of 2 in refluxing toluene.