6-Aminonicotinic acid → HCID 58869827, compound

Participants

Reaction Conditions

Reaction Steps

The product from Example 1, Part E (300 mg, 1.02 mmol) was taken up in 4 mL CH2Cl2 and cooled to 0° C. Oxalyl chloride (0.1 mL, 1.22 mmol) was added slowly and stirring continued for 0.5 h. A slurry of 6-aminonicotinic acid (211 mg, 1.53 mmol) and diisopropylethylamine (0.27 mL, 1.53 mmol) was added slowly and stirring continued at room temperature for 16 h. Three drops of conc. HCl was added and the organic phase was washed with brine. The organic phase was dried (Na2SO4), filtered and evaporated. The product was purified by silica gel chromatography (12 mg, 3%). 1H NMR (400 MHz, CDCl3) δ 10.69 (s, 1H), 8.70 (m, 1H), 8.32 (m, 1H), 7.87 (m, 1H), 7.52 (m, 3H), 7.34 (m, 6H), 5.46 (m, 1H), 4.60 (br s, 1H), 4.31 (m, 1H), 2.54 (m, 2H), 2.09 (m, 2H). MS: m/z (MH+) 416.

Provenance & Evidence