29373-04-4

Basic information

• Product Name: 2,3-Dihydro-3-methyl-4H-1-benzothiopyran-4-one 1-oxide
• Synonyms: 2,3-Dihydro-3-methyl-4H-1-benzothiopyran-4-one 1-oxide
• CAS NO: 29373-04-4
• Molecular Formula: C₁₀H₁₀O₂S
• Molecular Weight: 0
• Mol File: 29373-04-4.mol

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 2,3-Dihydro-3-methyl-4H-1-benzothiopyran-4-one 1-oxide(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3-Dihydro-3-methyl-4H-1-benzothiopyran-4-one 1-oxide(29373-04-4)
• EPA Substance Registry System: 2,3-Dihydro-3-methyl-4H-1-benzothiopyran-4-one 1-oxide(29373-04-4)

Safety Data

• Hazardous Substances Data: 29373-04-4(Hazardous Substances Data)

Upstream product

• 771-17-5 3-methyl-2,3-dihydro-4H-thiochromen-4-one 
• 127-65-1 chloroamine-T 

Downstream Products

• 16837-43-7 2-benzoylpropanal 

Relevant articles and documents

Ring Contractions of Thiochroman-4-ones and Thiochromen-4-ones

3-Bromothiochroman-4-one and its S-oxide undergo ring contraction on heating, especially in the presence of sodium acetate, to give mixtures which include thioindigo (9) and the ethanediylidenethioindigo (10).Brominated 2,2-dimethylthiochroman-4-one reacts on silica gel to form thioindigo, thioindirubin, and the bis(benzothieno)pyran (17).Bromination of thiochromanone gives a number of products, including 2,3-dibromothiochromen-4-one S-oxide which, on heating with sodium acetate in acetic acid, is converted efficiently into thioindigo.The mechanism of this reaction is investigated.

Conversions of Thiochroman-4-ones into 1,2-Benzothiazepine, Benzothiophen, and 1,2-Benzisothiazole Systems via Sulphimide Intermediates

Reaction of thiochroman-4-ones (1a-g) with chloramine-T gave the corresponding N-tosylsulphimides (2a-g) and sulphoxides (5a-g).The N-tosylsulphimides (2a-d), on reaction with triethylamine in chloroform, gave 2-tosyl-2,3-dihydro-1,2-benzothiazepin-5(4H)-

SULFILIMINES IN ORGANIC SYNTHESES: NEW ENTRIES INTO TETRAHYDRO-1,2-BENZOTHIAZEPINE AND 1,2-BENZISOTHIAZOLE SYSTEMS

Novel ring transformations of thiochroman-4-ones and benzothiophen-3(2H)-ones to tetrahydro-1,2-benzothiazepin-5-ones and 1,2-benzisothiazoles via sulfilimine intermediates are described.