Reacción #80761

Ecuación de reacción

6-bromo-2-methoxycarbonylmethyl-N-ethoxalyltetrahydroquinoline

ammonium nitrate

trifluoroacetic anhydride

→

title compound

Rendimiento 106.7%

6-Bromo-2-methoxycarbonylmethyl-8-nitro-N-ethoxalyltetrahydroquinoline

Rendimiento 106.7%

Disolventes

chloroform

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONwas added
2. 2
   OtroThe organic layer was separated
3. 3
   Lavadowashed with saturated aqueous sodium bicarbonate and brine
4. 4
   Secadodried over magnesium sulfate
5. 5
   Concentraciónconcentrated

Procedimiento

To a refluxed solution of 6-bromo-2-methoxycarbonylmethyl-N-ethoxalyltetrahydroquinoline (40 g) and ammonium nitrate (8 g, 0.1 mol) in chloroform (100 mL) was added dropwise trifluoroacetic anhydride (56.5 mL, 0.4 mol) over 40 min. The reflux was continued for 90 min and crashed ice was added. The organic layer was separated, washed with saturated aqueous sodium bicarbonate and brine, dried over magnesium sulfate, and concentrated to give 46 g of the title compound (quant): 1H NMR (270 MHz, CDCl3) δ8.11 and 7.99 (d and d, 1H, J=2 Hz), 7.66 and 7.61 (d and d, 1H, J=2 Hz), 5.03~5.16 and 4.74~4.85 (m and m, 1H), 4.37~4.49 and 4.13 (m and q, 2H, J=7.2 Hz), 3.72 and 3.62 (s and s, 3H), 2.44~3.02 (m, 5H), 1.65~1.80 and 1.50~1.60 (m and m, 1H), 1.42 and 1.23 (t and t, 3H, J=7.2 and 7.2 Hz).

Fuente