Dimethylformamide → HCID 59355588, compound

Participants

Reaction Steps

A mixture of 6-chloro-nicotinonitrile (2.1 g, 15.16 mmol, 1.0 equiv; commercially available) and 4-amino-piperidine-1-carboxylic acid tert-butyl ester (4.86 g, 24.25 mmol, 1.6 equiv; commercially available) in N-ethyl diisopropylamine (5 mL) and anhydrous DMF (10 mL) was stirred at 60° C. for 3 d. To the reaction mixture was added a sat. solution of Na2CO3 (100 mL) and the crude extracted with ethyl acetate (3×100 mL). The combined organic phases were dried over MgSO4, concentrated by evaporation under reduced pressure and the crude material purified with silica column chromatography eluting with toluene/ethyl acetate (4:1) to provide 2.90 g (63%) of the title compound. 1H NMR (300 MHz, DMSO): δ 1.24-1.42 (m, 2H), 1.41 (s, 9H), 1.84-1.89 (m, 2H), 2.85-2.94 (m, 2H), 3.87-3.91 (m, 2H), 3.98 (br s, 1H), 6.54 (d, J=8.9 Hz, 1H), 7.53 (d, J=7.5 Hz, 1H), 7.66 (dd, J=8.9 Hz, J=2.1 Hz, 1H), 8.38 (d, J=2.1 Hz, 1H), 13C NMR (75 MHz, DMSO): δ 828.04, 31.19, 42.25, 47.12, 78.58, 94.49, 108.62, 118.91, 138.53, 153.00, 153.89, 159.17. MS (ISP): 303.1 [M+H]+.

Provenance & Evidence