Diisopropylethylamine → HCID 140448329, compound

Participants

Reaction Steps

A solution of 1-(4-amidinobenzyl)-4-(7-chloro-2H-benzopyran-3-sulfonyl)-2-piperazinone hydrochloride (99 mg), O-(1-acetoxyethoxycarbonyl)-4-nitrophenol (54 mg), diisopropylethylamine (39 mg) in DMF (5 ml) was stirred at 80° C. for 1 hour. The reaction solution was concentrated under reduced pressure, and to the residue was added ethyl acetate. The mixture was washed with sodium bicarbonate solution and saturated brine, dried (MgSO4) and concentrated. Precipitated crystals were washed with ether to give colorless crystals of the title compound (49 mg).

Provenance & Evidence