Pyridine → HCID 44231693, compound

Participants

Reaction Steps

p-Tolyl pyruvate was prepared as follows. p-cresol (540 mg, 5 mmol) and pyruvic acid (440 mg, 5 mmol) were dissolved in methylene chloride (30 mL) and cooled on an ice bath. Pyridine (790 mg. 1 mL, 12.4 mmol) was added, followed by addition of 1,1-dichloromethyl methyl ether (690 mg, 0.53 mL, 6 mmol). The reaction mixture was stirred for 1 h on an ice bath, warmed to room temperature and washed with 30 mL of 5% aqueous HCl and 30 mL of saturated aqueous NaHCO3. The organic layer was dried over anhydrous MgSO4, filtered and solvent removed on a rotary evaporator. The residue was purified by flash silica gel chromatography (20:1→15:1 hexanes-ethyl acetate) to give 450 mg of p-tolyl pyruvate as a clear oil. 1H NMR (400 MHZ, CDCl3) δ 7.21 (d, J=4 Hz, 2H), 7.05 (d, J=4 Hz, 2H), 2.59 (s, 3H), 2.36 (s, 2H). 13C NMR (100 MHZ, CDCl3) δ 191.3, 159.5, 148.1, 136.6, 130.4, 120.8, 27.0, 21.1. HRMS (ESI-12 Tesla FT-MS) [M+H]+ calcd. 179.0708, found 179.0709.

Provenance & Evidence