5'-Methylspiro[chromane-4,2'-imidazole]-4',6-diamine → N-(4'-amino-5'-methylspiro[chroman-4,2'-imidazole]-6-yl)-5-(but-2-ynyloxy)picolinamide

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Reaction Steps

The title compound (15 mg, 16% yield) was prepared as described for Example 13a starting from 5-(but-2-ynyloxy)picolinic acid (Intermediate 19, 45 mg, 0.24 mmol) and 5′-methylspiro[chroman-4,2′-imidazole]-4′,6-diamine (Intermediate 30, 54.7 mg, 0.24 mmol): 1H NMR (500 MHz, CDCl3) δ ppm 1.87 (t, 3H), 2.03 (m, 1H), 2.30 (m, 1H), 2.39 (m, 3H), 4.50 (m, 1H), 4.62 (m, 1H), 4.76 (m, 2H), 6.92 (d, 1H), 6.98 (m, 1H), 7.41 (dd, 1H), 7.49 (m, 1H), 8.18 (d, 1H), 8.28 (d, 1H), 9.61 (s, 1H); MS (ES+) m/z 404 [M+H]+.

Provenance & Evidence