1,2-Dichloroethane → N-[((3S)-1-{2-[3-fluoro-6-(methyloxy)-1,5-naphthyridin-4-yl]ethyl}-3-pyrrolidinyl)methyl]-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazine-6-carboxamide

Participants

Reaction Steps

To a stirred solution of (3S,4S)-4-(aminomethyl)-1-{2-[3-fluoro-6-(methyloxy)-1,5-naphthyridin-4-yl]ethyl}-3-pyrrolidinol (105 mg, 0.34 mmole) in dry in DMF (25 mL) at RT was added diisopropylethylamine (0.18 mL, 1.02 mmole), 3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazine-6-carboxylic acid (0.93 mg, 0.44 mmole), hydroxybenzotriazole hydrate (51 mg, 0.38 mmole) and EDC (73 mg, 0.38 mmole). After 18 h, the reaction contents were concentrated under high vacuum. Purification on silica (CHCl3/MeOH, 9:1 containing 5% NH4OH) afforded the title compound (30 mg, 17%) as a light yellow solid: 1H NMR (400 MHz, CD3OD) δ 8.62 (m, 1H), 8.56 (s, 1H), 8.16 (d, J=9.04 Hz, 1H), 7.99 (m, 1H), 7.83 (d, J=7.91 Hz, 1H), 7.76 (d, J=7.92 Hz, 1H), 7.05 (d, J=9.04 Hz, 1H), 4.07 (s, 3H), 3.53 (d, 2H), 2.43-3.51 (br m, 11H), 2.06 (m, 1H), 1.58 (m, 1H). LC-MS (ES) m/e 497 (M+H)+.

Provenance & Evidence