반응 #2446134

반응 방정식

methyl iodide

6-bromo-3,4-dihydro-1H-quinolin-2-one

potassium tert-butylate

→

6-bromo-1-methyl-3,4-dihydro-1H-quinolin-2-one

수율 78.0%

용매

DMF

HCl

DMF

반응 조건

후처리

1. 1
   workup.WAITFollowing overnight
2. 2
   workup.STIRRINGstirring
3. 3
   추출Extraction with ethyl acetate (2×100 mL)
4. 4
   세척by washing of the organic extracts with water and brine
5. 5
   건조drying over MgSO4 and removal of the solvent in vacuo
6. 6
   기타gave a light yellow solid
7. 7
   기타Purification by flash chromatography (hexanes/ethyl acetate, 7/3, Rf=0.21)

실험 절차

To a solution of 6-bromo-3,4-dihydro-1H-quinolin-2-one (339 mg, 1.50 mmol) in 15 ml dry DMF was added potassium tert-butylate (336 mg, 3.0 mmol). After the mixture was stirred for 30 min at room temperature, a solution of methyl iodide (426 mg, 3.0 mmol) in 5 ml dry DMF was added. Following overnight stirring, the mixture was diluted with 100 ml 1 N HCl. Extraction with ethyl acetate (2×100 mL) followed by washing of the organic extracts with water and brine, drying over MgSO4 and removal of the solvent in vacuo gave a light yellow solid. Purification by flash chromatography (hexanes/ethyl acetate, 7/3, Rf=0.21) gave 6-bromo-1-methyl-3,4-dihydro-1H-quinolin-2-one (281 mg, 1.17 mmol, 78%) as colorless needles.

출처