反应详情

A solution of tert-butyl N′-(3-aminoquinolin-4-yl)hydrazinecarboxylate (2.18 g, 7.96 mmol) in 80 mL of anhydrous CH2Cl2 was cooled to 0° C. and treated with triethylamine (1.12 mL, 8.00 mmol) and valeryl chloride (0.95 mL, 8.00 mmol) under an atmosphere of nitrogen. After stirring for 3 h, the reaction mixture was concentrated under reduced pressure and the residue was treated with Et2O and filtered. The filtrate was concentrated and the resulting black tar was dissolved in 80 mL of ethanol and treated with 3 mL of triethylamine and the mixture was refluxed overnight. The reaction mixture was concentrated under reduced pressure. Chromatography (SiO2, 1–5% methanol (MeOH)/CHCl3) gave tert-butyl N-(2-butyl-1H-imidazo[4,5-c]quinolin-1-yl)carbamate (1.41 g) as a mauve foam.

1. concentrationthe reaction mixture was concentrated under reduced pressure
2. additionthe residue was treated with Et2O
3. filtrationfiltered
4. concentrationThe filtrate was concentrated
5. dissolutionthe resulting black tar was dissolved in 80 mL of ethanol
6. additiontreated with 3 mL of triethylamine
7. temperaturethe mixture was refluxed overnight
8. concentrationThe reaction mixture was concentrated under reduced pressure