56022-26-5

Basic information

• Product Name: 2-Thioxo-2,3-dihydro-4H-1,3-benzothiazin-4-one
• Synonyms: 2-Thioxo-2,3-dihydro-4H-1,3-benzothiazin-4-one;2-Thioxo-2,3-dihydro-benzo[e][1,3]thiazin-4-one;2-mercapto-4H-benzo[e][1,3]thiazin-4-one
• CAS NO: 56022-26-5
• Molecular Formula: C₈H₅NOS₂
• Molecular Weight: 195.2614
• Mol File: 56022-26-5.mol
• Article Data: 2

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 2-Thioxo-2,3-dihydro-4H-1,3-benzothiazin-4-one(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Thioxo-2,3-dihydro-4H-1,3-benzothiazin-4-one(56022-26-5)
• EPA Substance Registry System: 2-Thioxo-2,3-dihydro-4H-1,3-benzothiazin-4-one(56022-26-5)

Safety Data

• HazardClass: IRRITANT
• Hazardous Substances Data: 56022-26-5(Hazardous Substances Data)

Upstream product

• 333-20-0 potassium thioacyanate 
• 147-93-3 Thiosalicylic acid 
• 89430-08-0 C₂₀H₁₅N₂PS₂ 

Downstream Products

• 23588-63-8 2-(N-methyl-anilino)-benzo[e][1,3]thiazin-4-one 

Relevant articles and documents

Alkylation of 1,3-benzothiazin-4-one 2-oxo-, 2-arylimino-, and 2-thioxo derivatives

[Figure not available: see fulltext.] Sodium salt of 3H -benzo[e][1,3]thiazine-2,4-dione is easily alkylated at position 3. In the case of 2-(arylimino)-2,3-dihydrobenzo[e][1,3]-thiazin-4-ones, the alkylation reaction at this position occurs regioselectively. Alkylation of 2-thioxo-2,3-dihydrobenzo[e][1,3]thiazin-4-one under the same conditions produced regioisomers, but S-alkylation at the exocyclic sulfur atom occurred in the presence of triethylamine. The reaction of 1-(4-oxo-3,4-dihydrobenzo[e][1,3]thiazin-2-ylidene)guanidine with methyl anthranilate led to the formation of tetracyclic quinazolino[2,1-b]quinazolinedione.