Acetic Anhydride → HCID 53642917, compound

Participants

Reaction Steps

A solution of methyl 4-[2-[5-(N-cyclopentylmethylcarbamoyl)-2-methylaminophenyl]-2-(hydroxyimino)ethyl]-3-methoxybenzoate (79.9 mg), 4-(dimethylamino)pyridine (22 mg), and acetic anhydride (0.17 ml) in dichloromethane (11 ml) was stirred under a nitrogen atmosphere for 15 hours. The solution was diluted with dichloromethane, washed with 5% w/v sodium hydrogen sulfate, water, and brine, then dried (MgSO4), and evaporated to give methyl 4-[2-(acetoxyimino)-2-[5-(N-cyclopentylmethylcarbamoyl)-2-methylaminophenyl]ethyl]-3-methoxybenzoate (74.1 mg, 85%) as a pink solid; NMR (80 MHz, CDCl3): 1.2-1.8[8H, (CH2)4 ], 2.1(s, 3H, CH3CO), 3.0(d, 3H, NCH3), 3.3(dd, 2H, CH2NH), 3.9(2s, 6H, 2×OCH3), 4.3(s, 2H, ArCH2), 5.8(broad, 1H, NHCO), 6.7(d, 1H), 7.0(d, 1H), 7.4-7.6(m, 3H), 7.8(d, 1H), 8.5(broad, 1H, CH3NH).

Provenance & Evidence