82843-18-3

Basic information

• Product Name: 3-ethyl-2-hydroxy-1,7,7-trimethyl-5-thioxo-5,6,7,8-tetrahydro-1,6-naphthyridin-4(1H)-one
• CAS NO: 82843-18-3
• Molecular Formula: C₁₃H₁₈N₂O₂S
• Molecular Weight: 266.3592
• Mol File: 82843-18-3.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 384.8°C at 760 mmHg
• Flash Point: 186.5°C
• Density: 1.29g/cm³
• Vapor Pressure: 1.66E-07mmHg at 25°C
• Refractive Index: 1.63
• CAS DataBase Reference: 3-ethyl-2-hydroxy-1,7,7-trimethyl-5-thioxo-5,6,7,8-tetrahydro-1,6-naphthyridin-4(1H)-one(CAS DataBase Reference)
• NIST Chemistry Reference: 3-ethyl-2-hydroxy-1,7,7-trimethyl-5-thioxo-5,6,7,8-tetrahydro-1,6-naphthyridin-4(1H)-one(82843-18-3)
• EPA Substance Registry System: 3-ethyl-2-hydroxy-1,7,7-trimethyl-5-thioxo-5,6,7,8-tetrahydro-1,6-naphthyridin-4(1H)-one(82843-18-3)

Safety Data

• Hazardous Substances Data: 82843-18-3(Hazardous Substances Data)

Upstream product

• 15781-72-3 bis(2,4,6-trichlorophenyl) ethylmalonate 
• 58913-37-4 4-methylamino-6,6-dimethyl-5,6-dihydropyridine-2(1H)-thione 

Relevant articles and documents

Reaction of 4-Alkylaminodihydro-2(1H)-pyridinethions and -ones resp. with Bis-trichlorophenyl-ethylmalonate

4-Alkylamino-2(1H)-pyridinethiones (1) react with bis-trichlorophenyl-ethylmalonate (3) to give four isomeric products: 5-thioxo-1,6-naphthyridine-2(1H)-ones (4), 7,7-dimethyl-4H-thiopyranopyridine-4-ones (6), 2,2-dimethyl-2H-thiopyranopyridine-5,7-dioles (7) and 2,2-dimethyl-2H-thiopyranopyridine-5(3H)-ones (8).On treatment with alkali the thioxogroup of 4 is hydrolyzed and 1,6-naphthyridinediones (5) are formed.Compound 5 can also be synthesized by heating the alkylaminopyridones (2) together with 3. 6 can be hydrolyzed to 2-thioxo-3-pyridylprop ylketones (12).On treatment with diluted alkali or conc. acid the aminogroup of 7 and 8 is hydrolyzed and 10 is formed.By heating in 20percent NaOH 10 is transformed to the dihydroxymercapto-3-pyridylmethylketone (11). - Keywords: 4-alkylaminodihydro-2(1H)pyridinthiones and -ones; Bis-trichlorphenylmalonate; 2H-Thiopyranopyridine-5,7-dioles; 4H-Thiopyranopyridine-4-ones; 2H-Thiopyranopyridine-5-ones; 5-Thioxo-1,6-naphthyridine-2(1H)-ones