N,N-Dimethylaniline → HCID 71503460, compound

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Reaction Steps

The 6-amino-3-pyridinecarbonitrile (commercially available, 0.470 g, 1.0 eq.) was dissolved in tetrahydrofuran (10 mL) then N,N-dimethylaniline (0.5 mL, 1.0 eq.) and methyl-4-chloro-4-oxo-butanoate (0.54 mL, 1.1 eq.) were successively added. The mixture was reflux for 12 h. The reaction was stopped and the solution was partitioned between ethyl acetate and water. The aqueous layer was separated and extracted with ethyl acetate (2×). The combined organic layer was dried on magnesium sulfate and concentrated under vacuum. The residue was purified by flash chromatography eluting with cyclohexane-ethyl acetate to give methyl 4-[(5-cyano-2-pyridyl)amino]-4-oxo-butanoate A1 (71%). M.p.=161-164° C. 1H NMR (400 MHz, DMSO-d6) δ 8.78 (s, 1H), 8.20 (m, 2H), 3.58 (s, 3H), 2.74 (t, 2H), 2.61 (t, 2H) ppm. LC-MS (Method B): RT 1.19, 234 (M+H+) The following compounds from table A or B were prepared by the same method using commercial or described starting aminopyridine:

Provenance & Evidence