4-Acetylbenzoic Acid → HCID 67482692, compound

Participants

Reaction Steps

4-Acetylbenzoic acid (2.45 g, 14.9 mmol), beta-alanine t-butyl ester hydrochloride (4.0 g, 22 mmol), DIEA (3.9 ml, 22 mmol) and DMAP (100 mg) were dissolved in DCM (100 ml). EDC hydrochloride (3.5 g, 18 mmol) was added in portions. Additional EDC (0.7 g) was added one hour later to complete the reaction. After a total of 3 hours, the reaction was partitioned between ethyl acetate and 0.5 N HCl. The organic layer was washed with 0.5 N HCl 3×, 5% K2CO3 2×, brine 2×. Evaporation of solvent, and chromatography over SiO2 (10-20% ethyl acetate in DCM) afforded tert-butyl N-(4-acetylbenzoyl)-β-alaninate as a while solid. NMR (500 MHz, CD3OD) δ: 1.44 (s, 9H); 2.57 (t, J=7.0 Hz, 2H); 2.63 (s, 3H); 3.61 (t, J=7.0 Hz, 2H); 7.89 (d, J=8.5 Hz, 2H); 8.05 (d, J=8.5 Hz, 2H).

Provenance & Evidence