68847-94-9

Basic information

• Product Name: 4H-1-Benzothiopyran-4-one, 3-bromo-
• CAS NO: 68847-94-9
• Molecular Formula: C9H5BrOS
• Molecular Weight: 241.108
• Mol File: 68847-94-9.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 4H-1-Benzothiopyran-4-one, 3-bromo-(CAS DataBase Reference)
• NIST Chemistry Reference: 4H-1-Benzothiopyran-4-one, 3-bromo-(68847-94-9)
• EPA Substance Registry System: 4H-1-Benzothiopyran-4-one, 3-bromo-(68847-94-9)

Safety Data

• Hazardous Substances Data: 68847-94-9(Hazardous Substances Data)

Upstream product

• 57314-29-1 3-bromothiochroman-4-one S-oxide 
• 67580-57-8 3,3-dibromothiochroman-4-one 
• 491-39-4 thiochromen-4-one 

Downstream Products

• 1338224-18-2 4-(4-oxo-4H-thiochromen-3-yl)benzoic acid 
• 1338224-17-1 tert-butyl 4-(4-oxo-4H-thiochromen-3-yl)benzoate 
• 109445-23-0 1,1-dioxo-2-phenylsulfanyl-1λ⁶-thiochromen-4-one 
• 128886-10-2 2-[1-Methylamino-meth-(E)-ylidene]-benzo[b]thiophen-3-one 
• 3844-31-3 trans-thioindigo 
• 74387-98-7 2-(N-phenylaminomethylene)-3(2H)-benzothiophene 
• 128886-09-9 2-[1-Dimethylamino-meth-(Z)-ylidene]-benzo[b]thiophen-3-one 
• 128886-12-4 2-[1-(4-Methoxy-phenylamino)-meth-(E)-ylidene]-benzo[b]thiophen-3-one 
• 128886-11-3 2-[1-p-Tolylamino-meth-(E)-ylidene]-benzo[b]thiophen-3-one 

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.