Dimethylformamide → 6-cyclohexyl-3-formyl-4-(methoxymethyl)-5-phenyl-4H-thieno[3,2-b]pyrrole-2-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A solution (0.2 M) of 6-cyclohexyl-4-(methoxymethyl)-5-phenyl-4H-thieno[3,2-b]pyrrole-2-carboxylic acid in THF was added dropwise to a solution (0.6 M) of sec-BuLi (3 eq.) and TMEDA (3 eq.) in THF at −78° C. After 5 min at −78° C., the resulting solution was treated with DMF (10 eq.) then was allowed to warm up at −10° C. The mixture was quenched with water and poured into aqueous HCl (0.1 N) and extracted with AcOEt. The combined organic phase was dried and concentrated to give the title compound (85%) as a solid, that was used as such.

Provenance & Evidence