Isopropanol → HCID 56963276, compound

Participants

Reaction Conditions

Reaction Steps

To a 250 ml flask was charged (6S,9R)-6-(2,3-difluorophenyl)-9-(triisopropylsilyloxy)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridin-5-amine di HCl salt (15 g, 25.88 mmol) and a solution of isopropanol:water (45 mL:15 mL). The mixture was heated to 82° C. for 6 h then dried via azeotropic distillation at atmospheric pressure using isopropanol until the KF was less than <3%. After fresh isopropanol (25 ml) was added, the mixture was heated to 70° C. and then isopropyl acetate (45 ml) was added that resulting in a white slurry. The slurry cooled to 22° C. for 15 min to afford a white solid (9.33 g, 99%). 1H NMR (500 MHz CD3OD) δ 8.77 (d, J=5.7 Hz, 1H), 8.47 (d, J=7.9 Hz, 1H), 8.11 (dd, J=6.0, 8.2 Hz, 1H), 7.21-7.32 (m, 3H), 5.53 (dd, J=3.8, 9.8 Hz, 1H) 5.33 (d, J=9.8 Hz, 1H), 3.5 (bm, 1H), 2.25-2.40 (m, 2H), 2.15 (bm, 1H), 1.90 (bm, 1H); 13C NMR (125 MHz, MeOD) δ 159.4, 153.9, 151.9 and 151.8, 149.7, 143.6, 141.8, 135.7, 130.6, 127.7, 126.8, 118.9, 70.0, 54.9, 42.2, 34.5, 33.4.

Provenance & Evidence