Trimethylsilyldiazomethane → HCID 178498304, compound

Participants

Reaction Steps

To a stirred solution of 6-hydroxynicotinic acid (500 mg, 3.594 mmol) in benzene (8 mL) and MeOH (2 mL) was added dropwise TMSCHN2 (1.97 mL, 3.953 mmol) at 0° C., and the mixture was stirred overnight at room temp. The reaction mixture was quenched by the addition of AcOH, and the resulting mixture was concentrated in vacuo. The residue was chromatographed on silica-gel with n-hexane-EtOAc (1:3, v/v) as eluent to give 269.8 mg (49%) methyl 2-hydroxypyridine-5-carboxylate as a white crystalline powder. IR (KBr) 3062, 1657, 1654, 1612, 1435, 1300, 1113,775, 642 cm−1; 1H-NMR (400 MHz, CDCl3) δ 3.87 (s, 3H), 6.58 (d, J=9.8 Hz, 1H), 7.99 (dd, J=2.4, 9.8 Hz, 1H), 8.19 (d, J=2.4 Hz, 1H); MS (FAB) m/z 154 (M++1); Anal. Calcd for C7H7NO3.1/4H2O: C, 53.33; H, 4.80; N, 8.89. Found: C, 53.58; H, 4.65; N, 8.87.

Provenance & Evidence