17304-62-0

Basic information

• Product Name: Pyrazol-5(4H)-one, 1-(2-benzothiazolyl)-3-methyl-
• Synonyms: Pyrazol-5(4H)-one, 1-(2-benzothiazolyl)-3-methyl-
• CAS NO: 17304-62-0
• Molecular Formula: C₁₁H₉N₃OS
• Molecular Weight: 0
• Mol File: 17304-62-0.mol
• Article Data: 7

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Pyrazol-5(4H)-one, 1-(2-benzothiazolyl)-3-methyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Pyrazol-5(4H)-one, 1-(2-benzothiazolyl)-3-methyl-(17304-62-0)
• EPA Substance Registry System: Pyrazol-5(4H)-one, 1-(2-benzothiazolyl)-3-methyl-(17304-62-0)

Safety Data

• Hazardous Substances Data: 17304-62-0(Hazardous Substances Data)

Upstream product

• 141-97-9 ethyl acetoacetate 
• 615-21-4 1,3-benzothiazol-2-ylhydrazine 
• 136-95-8 2-amino-benzthiazole 
• 149-30-4 2-Mercaptobenzothiazole 
• 16181-58-1 ethyl β-oxobutyrate(benzothiazol-2-yl) hydrazone 

Downstream Products

• 89936-53-8 4-(p-Methoxybenzylidene)-1-(2-benzothiazolyl)-3-methylpyrazolin-5-one 
• 89936-56-1 2-Benzothiazol-2-yl-4-[1-(4-dimethylamino-phenyl)-meth-(Z)-ylidene]-5-methyl-2,4-dihydro-pyrazol-3-one 
• 874989-66-9 (4E)-2-(1,3-benzothiazol-2-yl)-4-{(2E)-3-[4-(dimethylamino)phenyl]-2-propen-1-ylidene}-5-methyl-2,4-dihydro-3H-pyrazol-3-one 
• 874989-57-8 (4E)-2-(1,3-benzothiazol-2-yl)-4-{[4-hydroxy-3-methoxyphenyl]methylidene}-5-methyl-2,4-dihydro-3H-pyrazol-3-one 
• 89936-55-0 2-Benzothiazol-2-yl-5-methyl-4-[1-phenyl-meth-(Z)-ylidene]-2,4-dihydro-pyrazol-3-one 
• 137513-70-3 2-Benzothiazol-2-yl-5-methyl-4-[1-(3-nitro-phenyl)-meth-(Z)-ylidene]-2,4-dihydro-pyrazol-3-one 

Relevant articles and documents

Synthesis, characterization and theoretical study of new hetarylazopyrazolone dyes and investigation of their absorption spectra

A series of hetarylazopyrazolone dyes were synthesized by coupling 1-(2-benzothiazolyl)-3-methylpyrazol-5-one with six heterocylic amines prepared in nitrosyl sulphuric acid. The dyes were characterized by spectral methods and elemental analysis. The solvatochromic properties of the dyes were investigated in various solvents. Additionally, acid-base, concentration, temperature and substituent effects on the visible absorbtion spectra were also examined. The ground-state geometry of the synthesized compounds were studied by using density functional theory (DFT) calculations at the B3LYP/6-31+G(d) level of theory. The absorption spectra of the dyes are obtained by using time-dependent density functional theory (TD-DFT) method associated with the integral equation formalism polarizable continuum model (IEFPCM). Tautomerism of 1-(2-benzothiazolyl)-3-methyl-4-(2-thiazolylazo)pyrazol-5-one has been examined by means of B3LYP/6-31+G(d) method. Calculated absorption maxima are evaluated via comparison with experimental values.

Synthesis of benzothiazole substituted 4-arylidene-5-methyl-2,4-dihydro-3H- pyrazol-3-ones and 3-methyl-4,5-diaryl-4,5-dihydropyrazolo [3,4-c] pyrazoles as antimicrobial agents

2-(1,3-Benzothiazol-2-yl)-4-arylidene-5-methyl-2,4-dihydro-3H-pyrazol-3- ones (3a- f) were synthesized by stirring a mixture of 2-(1,3-benzothiazol-2-yl) -5-methyl-2,4- dihydro-3H-pyrazol-3-one .(2) and suitably substituted araldehydes in basic medium. Further compounds 3b and 3c on cyclocondensation with phenyl hydrazine in the presence of few drops of gl acetic acid furnished the desired compounds 4a and 4b. The synthesized compounds were tested for their in vitro antimicrobial activity. Compound 3f showed maximum inhibitory activity against the tested Gram-positive bacteria Enterococcus faecalis whereas compounds 3b and 3c exhibited significant activity against Candida albicans.

Cationic Pyrazolone Dyes, Method for Production Thereof and Coloring Agents for Keratin Fibers Containing Said Compounds

The present application relates to cationic pyrazolone dyes of the general formula (I), and to coloring agents for keratin fibers comprising these dyes.