Methyl 4-Formylbenzoate → 4-Carbomethoxybenzaldehyde o-methyloxime

Participants

Reaction Steps

Reaction of methyl 4-formylbenzoate with methoxylamine hydrochloride as described in the preparation of compound 3-A gave the title oxime ether (96% yield) as a white solid (mixture of E- and Z-isomers). The E-isomer was obtained as white crystals from hexane; mp 66-67° C. (Lit. mp 65-66° C., Cooks, R. G.; Varvoglis, A. G. Org. Mass Spectrum., 5, 1971, 687). 1HNMR 400 MHz (DMSO-d6) δ (ppm): (E-isomer) 3.86 (3H, s, OCH3), 3.93 (3H, s, OCH3), 7.75 (2H, d, aromatics), 7.98 (2H, d, aromatics), 8.32 (1H, s, CH).

Provenance & Evidence