55405-54-4

Upstream product

• 55405-42-0 2-benzoylbenzothiophen-3(2H)-one 
• 100-63-0 phenylhydrazine 
• 15424-14-3 N-phenylbenzohydrazonoyl chloride 
• 825-44-5 benzothiophene-1,1-dioxide 
• 32784-07-9 3-bromo-2-phenyl-thiochroman-4-one 
• 55405-51-1 (3-hydroxy-benzo[b]thiophen-2-yl)-phenyl-methanone phenylhydrazone 
• 54249-02-4 1,3-diphenyl-(3ar,8bc)-3a,8b-dihydro-1H-benzo[4,5]thieno[3,2-c]pyrazole 4,4-dioxide 

Relevant academic research and scientific papers

Transformation of 1-thioflavonoids by oxidation and dehydrogenation

Simple, efficient and selective new one-step transformations with DDQ, IBDA and I2/DMSO are presented for the dehydrogenation of thioflavanone (1α), as well as the oxidized (1c) and halogenated (1d) derivatives. Ring- contraction reactions of the 1-oxide 1b and 1d leading to the formation of the benzothiophen derivatives 3a and 5, respectively, are also described.

Synthesis of 1H-[1]Benzothieno[3.2-c]pyrazoles

Derivatives of 1 H-[1]Benzothieno[3,2-c]pyrazole were synthesized by a new method: 1.3-dipolar cycloaddition of substituted benzo[b]thiophene-1.1-dioxides with C-methyl-N-phenyl and C,N-diaryl-nitrilimines, resp., gave the corresponding title compounds. The structure was proved by conversion to known compounds.