Trimethylsilyldiazomethane → HCID 178498304, compound

Participants

Reaction Steps

To a stirred solution of 6-hydroxynicotinic acid (2 g, 14.38 mmol) in benzene (32 mL) and MEOH (8 mL) was added dropwise TMSCHN2 (1.97 mL, 3.953 mmol) at 0° C., and the resulting mixture was stirred for 2 hr at room temp. The mixture was quenched by the addition of AcOH and concentrated in vacuo. The residue was suspended in water and the solid was collected. The crude solid was washed with Et2O, and dried in vacuo to give 1.566 g (71%) methyl 2-hydroxypyridine-5-carboxylate as a pale brown crystalline powder. IR (KBr) 1655, 1645, 1610, 1433, 1300, 1113, 777, 642 cm−1; 1H-NMR (400 MHz, DMSO-d6) δ 3.77 (s, 3H), 6.37 (d, J=9.8 Hz, 1H), 7.99 (dd, J=2.4, 9.8 Hz, 1H), 8.03 (d, J=2.4 Hz, 1H); MS (FAB) m/z 154 (M++1); Anal. Calcd for C7H7NO3: C, 54.90; H, 4.61; N, 9.15. Found: C, 54.89; H, 4.60; N, 9.13.

Provenance & Evidence