Reacción #1809

Ecuación de reacción

product

2,8-Dimethoxy-5-[4-[2-(1-piperidinyl)ethoxy]phenyl]-11,12-dihydro-6H-benzo[c]phenanthrid-6-one

lithium aluminum hydride

→

title compound

Rendimiento 72.4%

2,8-Dimethoxy-5-[4-[2-(1-piperidinyl)ethoxy]phenyl]-11,12-dihydro-6H-benzo[c]phenanthridine

Rendimiento 72.4%

Disolventes

THF

Condiciones de reacción

Tratamiento posterior

1. 1
   Otroto return to room temperature
2. 2
   Temperaturabriefly warmed
3. 3
   Temperaturato reflux
4. 4
   Temperaturacooled
5. 5
   Otroquenched with ethyl acetate (50 mL)
6. 6
   ExtracciónThe aqueous layer was extracted with ethyl acetate (2×50 mL)
7. 7
   Secadothe combined organic layers were dried (sodium sulfate)
8. 8
   Concentraciónconcentrated
9. 9
   Otroand purified via radial chromatography (silica gel, 1:1 hexane

Procedimiento

A solution of the product of Example 12 (350 mg, 0.69 mmol) in THF (25 mL) was treated with lithium aluminum hydride (129 mg, 3.4 mmol) inducing a moderate exotherm. The mixture was allowed to return to room temperature and stirred for 2 h, then briefly warmed to reflux, cooled, and quenched with ethyl acetate (50 mL) followed by saturated ammonium chloride (50 mL). The aqueous layer was extracted with ethyl acetate (2×50 mL), and the combined organic layers were dried (sodium sulfate), concentrated; and purified via radial chromatography (silica gel, 1:1 hexane:ethyl acetate, 5% methanol, under an ammonia atmosphere) to provide 248 mg (64%) of the title compound as a yellow foam: 1H NMR (300 MHz, CDCl3) δ7.28 (d, J=8.5 Hz, 1H), 7.05 (d, J=8.5 Hz, 1H), 6.79 (m, 3H), 6.72 (d, J=2.6 Hz, 1H), 6.65 (d, 9.0 Hz, 2H), 6.58 (d, J=2.6 Hz, 1H), 6.52 (dd, J=8.6, 2.6 Hz, 1H), 4.65 (s, 2H), 3.94 (t, J=6.1 Hz, 2H), 3.74 (s, 3H), 3.74 (s, 3H), 2.96 (dd, J=8.3, 5.6, 2H), 2.81 (dd, J=8.3, 5.9 Hz, 2H), 2.66 (t, J=6.1 Hz, 2H), 2.43 (m, 4H), 1.5-1.6 (m, 4H), 1.3-1.5 (m, 2H); 13C NMR (75 MHz, CDCl3) δ158.5, 158.3, 153.3, 141.7, 138.4, 134.6, 132.3, 126.6, 126.2, 125.3, 122.9, 121.7, 120.5, 114.9, 113.4, 112.3, 111.2, 111.0, 65.8, 57.8, 55.6, 55.2, 55.1, 54.8, 29.0, 25.7, 24.0, 22.2; IR (CHCl3) 1610, 1506 cm-1 ; MS (FD) m/e 496 (M+); Anal. calc'd. for C32H36N2O3 : C, 77.37; H, 7.32; N, 5.64. Found: C, 77.25; H, 7.12; N, 5.75.

Fuente