反应详情

8-(1-bromoethyl)-N,N-dimethyl-2-((R)-2-methylmorpholino)-4-oxo-4H-chromene-6-carboxamide hydrobromide (150 mg, 0.30 mmol) and 4-fluoroaniline (0.113 mL, 1.19 mmol) in DMA (1 mL) were stirred at RT for 4 hrs. The reaction mixture was filtered and purified by preparative HPLC using a reverse-phase column (C-18, 5 microns silica, 19 mm diameter, 100 mm length, flow rate of 40 mL/minute) and decreasingly polar mixtures of water (containing 0.2% ammonium carbonate) and acetonitrile as eluent. A further purification was done by flash chromatography on silica gel eluting with 0 to 10% MeOH in DCM. The solvent was evaporated to dryness to afford a oil which was triturated with pentane to give 8-(1-(4-fluorophenylamino)ethyl)-N,N-dimethyl-2-((R)-2-methylmorpholino)-4-oxo-4H-chromene-6-carboxamide (80 mg, 59%) as a white solid. NMR Spectrum (DMSOd6): 1.16 (d, 3H), 1.50 (d, 3H), 2.66 (bs, 3H), 2.81 (ddd, 1H), 2.93 (bs, 3H), 3.14 (ddd, 1H), 3.57-3.70 (m, 2H), 3.87-4.03 (m, 3H), 4.93-5.01 (m, 1H), 5.62 (s, 1H), 6.24-6.29 (m, 1H), 6.43-6.50 (m, 2H), 6.85 (t, 2H), 7.55 (d, 0.5H), 7.56 (d, 0.5H), 7.77 (d, 1H).

1. filtrationThe reaction mixture was filtered
2. custompurified by preparative HPLC
3. customA further purification
4. customThe solvent was evaporated to dryness
5. customto afford a oil which
6. customwas triturated with pentane