N-[4-(benzyloxy)benzoyl]glycine methyl ester → HCID 6429415, compound

Oxazolyl chloride (4.0 mL, 45.9 mmol) and several drops of DMF were added to a solution of dichloromethane (5 mL) containing 4-benzyloxybenzoic acid (2.29 g, 10.0 mmol) under ice-cooling, and then dichloromethane (2.5 mL) was further added thereto. The mixture was stirred at room temperature for 2.5 hours, and the solvent was evaporated. The resulting residue was dissolved in dichloromethane (20 mL), and glycine methyl ester hydrochloride (1.39 g, 11.1 mmol) and N-ethyl-N,N-diisopropylamine (4.4 mL, 25.2 mmol) were added thereto under ice-cooling. The mixture was stirred at room temperature for 18 hours, and then water was added thereto to terminate the reaction. The mixture was extracted with dichloromethane, and the organic layers were combined and concentrated. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate, 3:4 to 0:1, v/v) to give N-[4-(benzyloxy)benzoyl]glycine methyl ester. Then, 1.66 g of this ester was dissolved in a solvent mixture of methanol (8 mL) and THF (8 mL). To the resulting mixture, 20% palladium hydroxide-carbon (168 mg) was added. The mixture was vigorously stirred at room temperature under a hydrogen atmosphere for 4 hours. The reaction mixture was filtered through Celite and then concentrated to give 1.19 g of the title compound (white powder, yield: 85%).

1. filtrationThe reaction mixture was filtered through Celite
2. concentrationconcentrated

ORD record

ord-4b6068efe992466f8bffdb5112818525

Source dataset

uspto-grants-2013_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08497397B2