Chloroform → HCID 53772462, compound

Participants

Reaction Steps

A suspension of 15.5 g thieno[3,2-b]benzofuran-2-carboxylic acid, 16.9 g of thionyl chloride, 150 ml of chloroform and 1 ml of dimethylformamide is refluxed 5 hours, the reaction mixture is screened and the solvent removed from the filtrate to yield thieno[3,2-b]benzofuran-2-carboxylic acid chloride as a brown solid. 5.1 g of the above mentioned acid chloride is added portionwise over 30 minutes to a stirred mixture of 2.7 g of 2-aminothiophenol, 50 ml of toluene and 5 ml of pyridine cooled in an ice bath. The mixture is then stirred at ambient temperature for 17 hours, cooled, filtered and the residue washed with ligroin to yield the amide of formula (X) ##STR18## as a brown solid.

Provenance & Evidence