Triethylamine → HCID 21993682, compound

Participants

Reaction Steps

1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (4.22 g, 22.0 mmol) was added to a stirred suspension of 5-thia-1,8b-diazaacenaphtylene-4-carboxylic acid (2.40 g, 11.0 mmol) and N-hydroxysuccinimide (2.53 g, 22.0 mmol) in acetonotrile (30 ml) at room temperature and the mixture was stirred at room temperature for 1.5 hours. A solution of 1-(3-aminopropan-1-yl)-4-tert-butoxycarbonyl-2-oxopiperazine (3.67 g, 14.3 mmol) and triethylamine (4.45 g, 44.0 mmol) in acetonitrile (15 ml) was added to the mixture. After stirring at room temperature for 19 hours, the reaction mixture was concentrated in vacuo. The residue was dissolved in water and extracted with chloroform. The extract was washed with brine, dried over MgSO4 and concentrated in vacuo. The residue was chromatographed on silica gel (50 g) with Ethyl acetate-Methanol (10:1) to give N-[3-(4-tert-butoxycarbonyl-2-oxopiperazin-1-yl)propan-1-yl]-5-thia-1,8b-diazaacenaphthylene-4-carboxamide as a purple amorphous powder(1.53 g, 30%).

Provenance & Evidence