59338-12-4

Upstream product

• 1804-54-2 1-(1',2'-dimethyl-phenyl)-1,2-dihydro-3,1-benzoxazin-4-one 
• 61-68-7 mefenamic Acid 
• 87-59-2 2,3-Dimethylaniline 
• 118-91-2 ortho-chlorobenzoic acid 

Downstream Products

• 95773-31-2 1-(2,3-Dimethyl-phenyl)-1H-quinazolin-4-one 
• 95773-27-6 1-(2,3-Dimethyl-phenyl)-1H-quinazoline-4-thione 
• 95773-49-2 [1-(2,3-Dimethyl-phenyl)-1H-quinazolin-(4Z)-ylidene]-hydrazine 
• 95773-45-8 1-(2,3-Dimethyl-phenyl)-1H-quinazolin-4-one oxime 
• 95772-96-6 [1-(2,3-Dimethyl-phenyl)-1H-benzo[c]isothiazol-(3Z)-ylidene]-phenyl-amine 
• 95772-87-5 1-(2,3-Dimethyl-phenyl)-3-phenylamino-2,3-dihydro-1H-quinazoline-4-thione 
• 95757-76-9 (N-acetyl phenylhydrazono)-4 (dimethyl-2,3 phenyl)-1 dihydro-1,4 2H-benzothiazine-3,1 
• 95757-83-8 N-[1-(2,3-Dimethyl-phenyl)-4-thioxo-1,4-dihydro-2H-quinazolin-3-yl]-N-phenyl-acetamide 
• 95773-36-7 1-(2,3-Dimethyl-phenyl)-4-methylsulfanyl-quinazolin-1-ium; iodide 
• 95773-57-2 1-(2,3-Dimethyl-phenyl)-3-methyl-4-oxo-3,4-dihydro-quinazolin-1-ium; iodide 
• 90071-25-3 1-(2,3-Dimethyl-phenyl)-4-methylsulfanyl-1,2-dihydro-quinazoline 
• 90071-22-0 1-(2,3-Dimethyl-phenyl)-4-methylsulfanyl-1,2-dihydro-quinazoline; hydriodide 
• 90070-77-2 1-(2,3-Dimethyl-phenyl)-3-methylamino-2,3-dihydro-1H-quinazoline-4-thione 
• 90070-92-1 1-(2,3-Dimethyl-phenyl)-2,3-dihydro-1H-quinazoline-4-thione 

Relevant academic research and scientific papers

COMPOSES SULFURES HETEROCYCLIQUES. XCVI. REACTION DE L'HYDRAZINE SUR LES DIHYDRO-1,2 BENZOTHIAZINE-3,1 THIONES-4

1-Alkyl-1,2-dihydro-3,1-benzothiazine-4-thiones 1, when reacting with hydrazine, give with a good yield a 1-alkyl-3-amino-2,3-dihydro-1H-quinazoline-4-thione-2, often together with a derivative of 1,3,4-thiadiazole-3. With 1-aryl-1,2-dihydro-3,1-benzothiazine-4-thiones, the main product of the reaction with hydrazine appears to be a 1-aryl-4-hydrazono-1,4-dihydro-2H-3,1-benzothiazine 4, sometimes with some amount of 3.On the contrary, when reacting with hydrazine, 1-alkyl (or 1-aryl)-1,2-dihydro-3,1-benzothiazin-4-ones lead to a 2-alkylamino (or arylamino)-benzohydrazide 5. By thermolysis 4 isomerizes into 2 which is accompanied by derivatives (3 and 7) of 1,3,4-thiadiazole.The structures of compounds 2, 4 and 7 have been studied by NMR and UV spectrometry.