Sodium Iodide → 1-(3,4,5-Trimethoxybenzoyl)-3-(2-(4-(1-(2-ethoxyethyl)-1H-benzimidazol-2-yl)[1,4]diazepan-1-yl)ethyl)-3-phenylpyrrolidine

Participants

Reaction Steps

Combine 1-(3,4,5-trimethoxybenzoyl)-3-phenyl-3-(2-methanesulfonyloxyethyl)pyrrolidine (prepared from (+)-3-phenyl-3-(2-hydroxyethyl)pyrrolidine (R,R)-di-p-anisoyltartaric acid salt) (1.43 g, 3.1 mmol), triethylamine (2.05 mL, 14.75 mmol), sodium iodide (0.46 g, 3.1 mmol), and 4-(1-(2-ethoxyethyl)-1H-benzimidazol-2-yl)[1,4]diazepane hydriodic acid salt (1.6 g, 2.95 mmol) in acetonitrile (40 ml). Heat to reflux. After 40 hours, evaporate in vacuo to give a residue. Partition the residue between dichloromethane and water. Separate the layers and extract the organic layer with a saturated aqueous sodium bicarbonate solution, water, and then brine. Dry the organic layer over MgSO4, filter, and evaporate in vacuo to give a residue. Chromatograph the residue on silica gel eluting sequentially with dichloromethane, 5% methanol/dichloromethane, and then 10% methanol/dichloromethane to give the title compound.

Provenance & Evidence