1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → (+/-)-1-Benzyl-N-(3,4-dihydro-2H-1,5-benzodioxepin-7-ylmethyl)-N-isobutylpyrrolidine-3-carboxamide

Participants

Reaction Steps

The above amine product, N-(9-chloro-3,4-dihydro-2H-1,5-benzodioxepin-7-ylmethyl)-2-methylpropan-1-amine (807 mg, 3 mmole) was combined with 1-Benzyl-pyrrolidine-3-carboxylic acid (615 mg, 3 mmole) in 50 ml dichloromethane. 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (764 mg, 4 mmole) and dimethyl aminopyridine (562 mg, 4 mmole) were added. The reaction solution was stirred at room temperature overnight. 50 ml of water was added and the mixture was extracted with 50 ml ethyl acetate three times. The organic layer was washed with saturated sodium bicarbonate, water and brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The product was purified by column chromatography using 50-75% ethyl acetate in hexane. MS (m+1)=457.3; H NMR (500 MHz, CDCl3) 0.95 (m, 6H), 2.00 (m, 1H), 2.05 (m, 1H), 2.15 (m, 1H), 2.25 (m, 1H), 2.55 (m, 1H), 2.65 (m, 1H), 2.90 (m, 1H), 3.00 (m, 1H), 3.10 (d, 1H), 3.15 (m, 1H), 3.25 (d, 1H), 3.40 (m, 1H), 3.75 (m, 2H), 4.30 (m, 4H), 4.45 (s, 1H), 4.55 (d, 1H), 6.6-7.0 (m, 2H), 7.2-7.5 (m, 5H).

Provenance & Evidence