3-Chlorobenzo[f][1,7]naphthyridin-5-amine → N3-butylbenzo[f][1,7]naphthyridine-3,5-diamine

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Reaction Conditions

Reaction Steps

A solution of 3-chlorobenzo[f][1,7]naphthyridin-5-amine (Example 20) (1.0 eq.) was dissolved in n-butylamine (0.1 M) and heated at 110° C. overnight. The reaction mixture was concentrated en vacuo, and the residue was purified by a COMBIFLASH® system (ISCO) using 0-90% ethyl acetate in hexane to give N3-butylbenzo[f][1,7]naphthyridine-3,5-diamine. 1H NMR (methanol d-4): δ 8.42 (d, 1H), 8.13 (d, 1H), 7.53 (d, 1H), 7.38-7.42 (dd, 1H), 7.25-7.29 (dd, 1H), 6.96 (d, 1H), 3.48 (t, 2H), 1.63-1.71 (m, 2H), 1.43-1.52 (m, 2H), 0.99 (t, 3H). LRMS [M+H]=267.2

Provenance & Evidence