4-Chlorobenzal of 2-Hydrazinobenzothiazole;4-chloro-benzaldehyde benzothiazol-2-yl-hydrazone;N-[(4-chlorophenyl)methylideneamino]-1,3-benzothiazol-2-amine
The reactions of lead tetra-acetate with substituted benzothiazolylhydrazones
作者:R. N. Butler、P. O'Sullivan、F. L. Scott
DOI:10.1039/j39710002265
日期:——
In the reaction of benzothiazolylhydrazones of some aromatic aldehydes with leadtetra-acetate the presence of a sulphur atom in the potential cyclisation site of the heteroaryl moiety inhibits the cyclisation reaction. Thus, the reaction of substituted benzothiazolylhydrazones involves an acetoxylation of the hydrazone and not a cyclisation reaction as had previously been reported. Cyclisation of
Arylhydrazones Derivatives Containing a Benzothiazole Moiety, Efficient Ligands in the Palladium-Catalyzed Mizoroki-Heck and Suzuki-Miyaura Cross-coupling Reactions under IR Irradiation
作者:Fernando Ortega-Jiménez、José Guillermo Penieres-Carrillo、José Guadalupe López-Cortés、M. Carmen Ortega-Alfaro、Selene Lagunas-Rivera
DOI:10.1002/cjoc.201700390
日期:2017.12
A simple arylhydrazone containing the benzothiazole moiety which may be used as an efficient ligand in the palladium‐catalyzed Mizoroki–Heck and Suzuki–Miyaura cross‐coupling reactions, under infrared irradiation as an alternative source of energy, is presented. The reactions proceeded with extremely high efficiency under mild conditions and produced very good yields.
Thallium(III) Salts Mediated Oxidative Cyclization of Arenecarbaldehyde Benzothiazol-2-ylhydrazones to Bridged Head Nitrogen Heterocycles
作者:Om V. Singh、Varughese George
DOI:10.1080/00397919408010575
日期:1994.10
arenecarbaldehydebenzothiazol-2-ylhydrazones (4) with thallium (III) acetate in refluxing acetic acid, thallium (III) acetate and thallium (III) nitrate in acetonitrile in presence of p-toluene sulphonic acid afforded 3-aryl-1,2,4-triazolo[3,4-b]benzothiazoles (6) by intramolecular cyclization in high yield. A mechanistic scheme for this transformation has been proposed.