Reaktion #9446

Reaktionsgleichung

7-Bromo-N4-isobutylquinoline-3,4-diamine

trimethyl orthovalerate

→

7-bromo-2-butyl-1-isobutyl-1H-imidazo[4,5-c]quinoline

Ausbeute 43.9%

Lösungsmittel

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturheated
2. 2
   Temperaturto reflux for 30 min
3. 3
   Einengenconcentrated
4. 4
   Sonstigethe residue was purified by chromatography on silica gel (75% ethyl acetate in hexane to 100% ethyl acetate gradient)

Vorschrift

7-Bromo-N4-isobutylquinoline-3,4-diamine (39.4 g of crude material), trimethyl orthovalerate (32 g, 0.20 mol), and pyridine hydrochloride (0.31 g, 2.7 mmol) were combined with anhydrous toluene (500 mL) and heated to reflux for 30 min. The reaction was cooled to room temperature, concentrated, and the residue was purified by chromatography on silica gel (75% ethyl acetate in hexane to 100% ethyl acetate gradient) to afford 21.2 g of 7-bromo-2-butyl-1-isobutyl-1H-imidazo[4,5-c]quinoline as a yellow solid.

Quelle