1,2-Dichloroethane → (E)-3-(6-Amino-pyridin-3-yl)-N-(2-ethoxy-3-methoxy-benzyl)-N-methyl-acrylamide hydrochloride

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Reaction Steps

EDC (231 mg, 1.2 mmol) was added to a solution of (−3-(6-amino-pyridin-3-yl)acrylic acid (164 mg, 1.0 mmol), (2-ethoxy-3-methoxy-benzyl)methylamine (215 mg, 1.1 mmol), HOBt H2O (149 mg, 1.1 mmol) and DIPEA (525 μL, 3.0 mmol) in dry DMF (10 mL). After 18 hr of stirring, the mixture was diluted with water (60 mL) and extracted with EtOAc (2×20 mL). The organic layer was washed with brine (2×30 mL), dried and evaporated. Flash chromatography (silica 1-3% MeOH in CH2Cl2) furnished pure free base which was dissolved in CH2Cl2 (10 mL). After addition of HCl (1.5 mL, 1M in ether), the solvents were evaporated and the residue was washed with ether and dried to afford the title compound (172 mg, 46%). 1H NMR (300 MHz, DMSO-d6) δ 8.28 (m, 3H), 7.48 and 7.45 (rotamers, 2d, J=15.4 Hz, 1H), 7.25 and 7.23 (rotamers, 2d, J=15.4 Hz, 11H), 7.00 (m, 3H), 6.62 (m, 1H), 4.78 and 4.63 (rotamers, 2s, 2H), 3.98 (m, 2H), 3.79 (s, 3H), 3.08 and 2.84 (rotamers, 2s, 3H), 1.28 (m, 3H). MS (ESI) m/e 342 (M+H)+.

Provenance & Evidence