Acetic acid, 2,2-dimethoxy-, methyl ester → N-(5-bromo-2-fluorobenzyl)-2,2-dimethoxyacetamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 5-bromo-2-fluorobenzylamine hydrochloride (15.0 g, 62 mmol), methyl dimethoxyacetate (10.0 g, 75 mmol), and DIPEA (10.3 mL, 62 mmol) in methanol (15 mL) was heated at 60° C. for 16 h in a bomb apparatus. After cooling to RT, the solvent was evaporated and DCM (150 mL) was added. The solution was washed with water (2×30 mL), dried over Na2SO4, filtered, and concentrated under reduced pressure to give the crude product. It was purified by column chromatography on silica gel using EtOAc/Hexanes (1:1) to give the title compound. 1H NMR (CDCl3, 300 MHz) δ=3.42 (s, 6H), 4.53 (d, J=4.8 Hz, 2H), 4.81 (s, 1H), 6.96 (t, J=6.8 Hz, 1H), 7.40-7.42 (m, 1H), 7.51-7.54 (m, 1H). MS(ES+): m/z=305.73/307.69 [MH+]. HPLC: tR=2.89 min (polar—5 min, ZQ2).

Provenance & Evidence