87833-84-9

Upstream product

• 104-88-1 4-chlorobenzaldehyde 
• 5325-20-2 2H-1,4-benzothiazin-3-one 
• 85809-67-2 (Z)-2-(4-chlorobenzylidene)-4-methyl-2H-benzo[b][1,4]thiazin-3(4H)-one 

Relevant academic research and scientific papers

A Simple Ring-expansion of 1,4-Benzothiazines to give 1,5-Benzothiazepines

A new ring-expansion of 2-phenylmethylene-2H-1,4-benzothiazin-3(4H)-ones (1) to give 2,3-dihydro-3-oxo-2-phenyl-1,5-benzothiazepin-4(5H)-ones (3) has been developed; an episulphonium ion intermediate could be involved.