Ethylene Glycol → HCID 71254747, compound

Participants

Reaction Steps

To a solution of methyl 4-formyl-3-nitrobenzoate (9.0 g, 43.0 mmol) in toluene (150 mL) was added ethylene glycol (7.20 mL, 129 mmol) followed by p-TsOH (0.409 g, 2.152 mmol) and the reaction mixture was heated at reflux temperature with azeotropic removal of H2O using a Dean-Stark trap for 4 h. The reaction mixture was then cooled and diluted with DCM. The DCM layer was then washed with saturated NaHCO3 solution. The organic layer was dried (MgSO4), filtered, and concentrated to yield a residue. The residue was dissolved in minimal quantity of DCM and purified by silica gel chromatography to yield the desired product (8.53 g, 78%) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ 8.39 (s, 1H), 8.27 (d, J=8.2 Hz, 1H), 7.90 (d, J=8.2 Hz, 1H), 6.38 (s, 1H), 4.00 (dt, J=3.8, 1.9 Hz, 2H), 3.94 (dt, J=3.8, 1.9 Hz, 2H), 3.91 (s, 3H) ppm.

Provenance & Evidence