反应详情

温度

80 °C

To a solution of ethyl 1,1,3-trimethyl-2-oxo-2,3,9,10-tetrahydro-1H-pyrido[3′,4′:4,5]pyrrolo[1,2,3-de]quinoxaline-8(7H)-carboxylate (240 mg, 0.7 mmol) in THF (20 mL) at 25° C. was added BH3/THF complex (0.7 mL, 0.7 mmol). The mixture was stirred at 80° C. for 5 hours then cooled to rt and added 6N HCl (10 mL) with stirred for another 1 hr. About 30 mL of H2O was added and then was extracted with EtOAc (2×30 mL). The combined extracts were dried over magnesium sulfate, concentrated, and purified by flash chromatography to give ethyl-1,1,3-trimethyl-2,3,9,10-tetrahydro-1H-pyrido[3′,4′:4,5]pyrrolo[1,2,3-de]quinoxaline-8(7H)-carboxylate as an oil (152 mg, 66%). MS [M+H]+ 327. 1H NMR (CDCl3, 300 MHz) δ 7.01 (t, 1H, J=7.7 Hz), 6.97 (d, 1H, J=7.7 Hz), 6.41 (d, 1H, J=7.7 Hz), 4.68 (s, 2H), 4.23 (m, 2H), 3.84 (m, 2H), 3.11 (m, 2H), 2.99 (s, 3H), 1.54 (s, 6H), 1.27 (t, 3H, J=7.3 Hz) ppm.

1. temperaturethen cooled to rt
2. stirringwith stirred for another 1 hr
3. extractionwas extracted with EtOAc (2×30 mL)
4. dry with materialThe combined extracts were dried over magnesium sulfate
5. concentrationconcentrated
6. custompurified by flash chromatography