257953-67-6

Upstream product

• 75-15-0 carbon disulfide 
• 3594-36-3 1,3-bis(p-methylphenyl)-1,3-propanedione 
• 105-36-2 ethyl bromoacetate 
• 281663-92-1 [1-ethoxycarbonylmethylsulfanyl-2-(4-methyl-benzoyl)-3-oxo-3-p-tolyl-propenylsulfanyl]-acetic acid ethyl ester 

Downstream Products

• 281663-93-2 3,4-di-p-tolyl-thieno[2,3-b]thiophene-2,5-dicarboxylic acid 

Relevant academic research and scientific papers

Synthesis of 3,4-bis (4'-methylphenyl) thieno [2,3-b]thiophene: First example of peri-diaryl thienothiophene

3,4-bis(4'-methylphenyl) thienothiophene, the first example of peri- (3,4) diaryl thienothiophene has been synthesized by a sequence involving preparation of ketene dithioacetal, Dieckmann type cyclization, ester hydrolysis and decarboxylation.

A convenient one-pot synthesis of 2,5-functionalized thieno[2,3-b]- thiophenes using anhydrous potassium fluoride in dimethylformamide

A simple one-pot synthesis of 2,5-functionalized thieno[2,3-b]thiophenes by the condensation of 1,3-diketones with CS2 and alkylating agents carrying an electron-withdrawing group such as CO2Et, COR or CN in the presence of anhydrous potassium fluoride as the condensation promoter in anhydrous DMF is described. The process is mild, convenient and offers reasonable yields.