反应详情

To a solution of methyl 1-(5-aminopyridin-2-yl)-4-methylpiperidine-4-carboxylate (2.96 g, 11.89 mmol) in DCM (100 mL) was added triethylamine (2.2 mL, 15.84 mmol) followed by methyl chlorooxoacetate (1.6 mL, 17.15 mmol) and the reaction mixture was allowed to stir at ambient temperature for 1.5 hrs. The reaction mixture was washed with brine (2×100 mL), the aqueous layer was re extracted with DCM (50 mL) and the organic washings were combined, dried and concentrated to leave the title compound as a brown gum (3.98 g, 11.89 mmol, 100%). 1H NMR (CDCl3) δ 1.72-1.82 (m, 2H), 1.96-2.02 (m, 2H), 2.52-2.59 (m, 1H), 2.95-3.03 (m, 2H), 3.70 (s, 3H), 3.97 (s, 3H), 4.16-4.22 (m, 2H), 6.67 (d, 1H), 7.93 (d, 1H), 8.28 (s, 1H), 8.66 (s, 1H); MS m/e MH+ 336.

1. washThe reaction mixture was washed with brine (2×100 mL)
2. extractionthe aqueous layer was re extracted with DCM (50 mL)
3. customdried
4. concentrationconcentrated