1,2-Dichloroethane → 5-Cyano-N-methoxy-N,2-dimethyl-6-oxo-4-p-tolyl-1,2,3,6-tetrahydropyridine-2-carboxamide

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Reaction Steps

Intermediate 108C (0.25 g, 0.925 mmol) was dissolved in DCM (15 mL) in a 25 mL 1 neck rb flask that was equipped with a magnetic stirrer and an Ar inlet. N,O-Dimethylhydroxylamine (0.062 g, 1.017 mmol), EDC (0.195 g, 1.017 mmol) and N-methylmorpholine (0.112 mL, 1.017 mmol) were added and the reaction mixture was stirred at rt overnight. The reaction solvent was removed under vacuum. The residue was dissolved in EtOAc (10 mL) and washed with water (5 mL). The organic phase was dried over MgSO4 and concentrated in vacuo to a dark solid. The crude product was purified by silica gel chromatography (40 g silica gel, eluted with 0-100% EtOAc in hexanes) to give the desired product (0089 g, 31%) as a white solid. LCMS Anal. Calc'd for C17H19N3O3 313.3, found [M+H] 314.1. 1H NMR (500 MHz, CDCl3) δ 7.67 (d, J=8.3 Hz, 2H), 7.30 (d, J=8.0 Hz, 2H), 3.81 (s, 3H), 3.69-3.75 (m, 1H), 3.22 (s, 3H), 2.72 (d, J=17.6 Hz, 1H), 2.42 (s, 3H), 1.63 (s, 3H).

Provenance & Evidence