Sodium hydride → HCID 46195987, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 3-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3′-indol]-2′(1′H)-one (0.29 g, 1.00 mmol) in N,N-dimethylformamide (10 mL) was added sodium hydride (0.05 g, 1.25 mmol) at 0° C. The reaction mixture was stirred at 0° C. for 30 min, then 2-(bromomethyl)-5-(trifluoromethyl)furan (0.25 mL, 1.80 mmol) was added. The mixture was stirred at ambient temperature for 20 h, diluted with ethyl acetate, washed with water and brine, and dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuum. The residue was purified by column chromatography with ethyl acetate in hexanes (10% to 40% gradient) to afford 3-methyl-1′-{[5-(trifluoromethyl)furan-2-yl]methyl}spiro[furo[3,2-f][1,2]benzisoxazole-5,3′-indol]-2′(1′H)-one (0.35 g, 80%): mp 111-112° C. (diethyl ether/hexanes); 1H NMR (300 MHz, CDCl3) δ7.46 (d, J=9.0 Hz, 1H), 7.33-7.27 (m, 1H), 7.15-7.12 (m, 1H), 7.06-7.01 (m, 3H), 6.77-6.76 (m, 1H), 6.55-6.52 (m, 1H), 5.20-4.85 (m, 4H), 2.44 (s, 3H); 13C NMR (75 MHz, CDCl3) δ175.7, 163.9, 158.1, 154.9, 151.6, 141.4, 130.2, 129.5, 123.9, 123.1, 120.7, 117.9, 117.1, 112.9, 109.3, 108.9, 108.8, 107.9, 81.2, 56.2, 37.5, 9.8; MS (ES+) m/z 462.9 (M+23).

Provenance & Evidence