Reaktion #568962

Reaktionsgleichung

nitric acid

1-methyl-3,4-dihydroisoquinoline

nitric acid

sodium hydroxide

→

1-methyl-7-nitro-3,4-dihydroisoquinoline

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONThe reaction mixture was poured into ice
2. 2
   Extraktionextracted with ethyl acetate
3. 3
   WaschenThe organic layer was washed with saturated aqueous solution of sodium chloride
4. 4
   Trocknendried with anhydrous sodium sulfate
5. 5
   SonstigeThe desiccant was separated by filtration
6. 6
   Sonstigethe filtrate was purified by silica gel column chromatography

Vorschrift

1.0 g of 1-methyl-3,4-dihydroisoquinoline was dissolved in 7.0 ml of conc. nitric acid at 0° C., and 14.0 ml of fuming nitric acid was added dropwise to the solution. The solution was stirred for one hour at the same temperature, and overnight at room temperature. The reaction mixture was poured into ice, neutralized with aqueous solution of sodium hydroxide, and extracted with ethyl acetate. The organic layer was washed with saturated aqueous solution of sodium chloride, and dried with anhydrous sodium sulfate. The desiccant was separated by filtration, and the filtrate was purified by silica gel column chromatography to obtain 1.08 g of 1-methyl-7-nitro-3,4-dihydroisoquinoline, which was white crystal (yield: 82%).

Quelle