Tetrahydrofurfurylamine → HCID 20789065, compound

Participants

Reaction Steps

The title compound was prepared as described in Example 76. To a solution of 3-(4-fluorophenyl)-1H-indazole-5-carboxylic acid (0.200 g, 0.781 mmol) in tetrahydrofuran (5 mL) was added 1-hydroxybenzotriazole hydrate (0.316 g, 2.34 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.449 g, 2.34 mmol), tetrahydrofurfurylamine (0.242 mL, 2.34 mmol) and N,N-dimethylformamide (2 mL). The solution was stirred for 16 h at room temperature. Water (40 mL) was added and the reaction mixture was extracted with ethyl acetate. The combined organic layers were dried over anhydrous sodium sulfate, filtered and evaporated. The residue was purified by preparative HPLC (10–90% acetonitrile/water). The pure fractions were made basic with ammonium hydroxide, the solution evaporated under reduced pressure, diluted with water and filtered which gave the title compound (0.198 g, 74% yield): 1H NMR (DMSO-d6) δ 13.43 (s, 1H), 8.71 (t, 1H), 8.56 (m, 1H), 8.08 (AB quartet, 2H), 7.92 (dd, 1H), 7.62 (dd, 1H), 7.40 (t, 2H), 4.01 quartet, 1H), 3.79 (q, 1H), 3.63 (q, 1H), 3.36 (m, 2H), 1.97 (m, 1H), 1.83 (m, 2H), 1.62 (m, 1H); ES-MS (m/z) 340 [M+1]+.

Provenance & Evidence