Methyl acetoacetate → HCID 86714143, compound

Participants

Reaction Steps

A mixture of 4-methoxybenzyl amine (3 g, 21.9 mmol) and 3-oxo-butyric acid methyl ester (2.83 mL, 26.2 mmol) in MeOH (80 mL) was refluxed for 2 h. Propynoic acid methyl ester (2.92 mL, 32.8 mmol) was added, and the resulting mixture was refluxed for 48 h. After cooling to r.t., the solvent was evaporated, and the crude residue was recrystallized from MeOH to give 5 g of the title compound as a yellow solid. 1H NMR (CDCl3, 200 MHz): δ=10.87 (br s, 1H), 7.76 (d, 1H, J=15.4 Hz), 7.18 (d, 2H, J=8.8 Hz), 6.89 (d, 2H, J=8.8 Hz), 6.09 (d, 1H, J=15.4 Hz), 4.50 (d, 2H, J=5.8 Hz), 3.80 (s, 3H), 3.77 (s, 3H), 3.73 (s, 3H), 2.27 (s, 3H).

Provenance & Evidence