Triethylamine → HCID 59902277, compound

Participants

Reaction Steps

Reflux a stirred solution of 2-[1,4]diazepan-1-yl-1-vinyl-1H-benzoimidazole dihydroiodide (0.70 g, 1.40 mmol), 1-(2-methoxy-5-(1H-tetrazol-1-yl)benzoyl-3-phenyl-3-(2-methanesulfonyloxyethyl)-pyrrolidine (0.61 g, 1.3 mmol, example 47.2), triethylamine (4.48 mmol) and acetonitrile (18 mL) under argon for 48 hours. Cool and concentrate in vacuo. Thin layer analysis (silica gel, 10% methanol/0.1% ammonium hydroxide solution in acetonitrile) indicates a mixture with a major component Rf=0.40. Dilute with dichloromethane (150 mL), wash the organic phase with NaHCO3 solution (50 mL), dry (Na2SO4) the organic phase, filter and evaporate in vacuo. Purify the residue by flash chromatography (silica gel, 7×15 cm) eluting with 10% methanol/0.1% ammonium hydroxide solution in dichloromethane, concentrate the appropriate fractions to afford a tan solid. Purify the solid (in three separate injections of 110 mg, 250 mg and 250 mg) by reverse phase chromatography (PrepPak 40×100 mm μBondapak C18, 10 μm, 125 A°, Waters 037684, flow rate 35 mL/minute using the following gradients: 5 minutes with 10% acetonitrile/90% water with 0.1% trifluoroacetic acid, increase over 30 minutes to 50/50 water/acetonitrile, hold 5 minutes at 50/50 water/acetonitrile, increase over 5 minutes to 100% acetonitrile, hold 15 minutes at 100% acetonitrile). Combine the desired fractions to afford 0.17 g of the title compound.

Provenance & Evidence