Reacción #45330

Ecuación de reacción

H2O

3-nitro-5-(trifluoromethyl)benzaldehyde

1-[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methanamine

NaCNBH3

→

{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}[3-nitro-5-(trifluoromethyl)benzyl]amine

Disolventes

MeOH

MeOH

Condiciones de reacción

Tratamiento posterior

1. 1
   ExtracciónThe mixture was extracted with EtOAc (60 mL)
2. 2
   Lavadothe organic extracts were washed with brine (20 mL)
3. 3
   Secadodried over Na2SO4
4. 4
   Filtraciónfiltered
5. 5
   Concentraciónconcentrated
6. 6
   OtroPurification by flash chromatography with 2% to 25% EtOAc/hexanes

Procedimiento

To a solution of 3-nitro-5-(trifluoromethyl)benzaldehyde (366 mg, 1.67 mmol) in MeOH (4 mL) was added a solution of 1-[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methanamine (270 mg, 0.84 mmol) in MeOH (4 mL) followed by addition of NaCNBH3 (105 mg, 1.67 mmol) and one drop of acetic acid. The reaction was stirred for 24 hours at room temperature and then poured into H2O (30 mL). The mixture was extracted with EtOAc (60 mL), and the organic extracts were washed with brine (20 mL), dried over Na2SO4, filtered, and concentrated. Purification by flash chromatography with 2% to 25% EtOAc/hexanes afforded {[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}[3-nitro-5-(trifluoromethyl)benzyl]amine as a yellow oil. Rf=0.45 (15% EtOAc/hexanes). LCMS=527.2 (M+1)+. 1H NMR (CDCl3, 500 MHz) δ 8.33 (s, 1H), 8.27 (s, 1H), 7.85 (s, 1H), 7.74 (s, 1H), 7.56 (d, J=8.0 Hz, 1H), 7.33 (d, J=8.0 Hz, 1H), 7.22 (dd, J=8.5 Hz, 2.0 Hz, 1H), 6.97 (d, J=2.0 Hz, 1H), 6.89 (d, J=8.5 Hz, 1H), 3.67-3.78 (m, 4H), 3.70 (s, 3H), 2.87 (m, 1H), 1.25 (d, J=7.0 Hz, 6H).

Fuente