P,P-Diphenylphosphinic azide → 4-Cyano-3-(2,4-dichlorophenyl)-5-morpholin-4-ylthiophene-2-carbonyl azide

Participants

Reaction Steps

To a solution of 4-cyano-3-(2,4-dichlorophenyl)-5-morpholin-4-ylthiophene-2-carboxylic acid (0.38 g, 0.99 mmol) and TEA (0.414 mL, 2.97 mmol) in anhydrous THF (15 mL) was added diphenylphosphoryl azide (0.341 mL, 1.58 mmol) in one portion, under nitrogen. The reaction mixture was allowed to stir at rt overnight, and was concentrated. The residue was purified by column chromatography to give 4-cyano-3-(2,4-dichlorophenyl)-5-morpholin-4-ylthiophene-2-carbonyl azide (0.318 g, 79%).

Provenance & Evidence