반응 #749004

반응 방정식

3-oxo-1,3-dihydroisobenzofuran-5-carbonitrile

3-bromo-2-methylaniline

trimethylaluminum

→

N-(3-bromo-2-methylphenyl)-5-cyano-2-(hydroxymethyl)benzamide

수율 14.0%

용매

DCM

DCM

DCM

반응 조건

후처리

1. 1
   workup.STIRRINGthe resulting mixture was stirred at rt overnight
2. 2
   세척washed with an aqueous solution of sodium potassium tartrate (Fehling's Reagent II) and water
3. 3
   기타was dried
4. 4
   농축concentrated
5. 5
   기타The residue was purified by column chromatography (
6. 6
   세척eluting with a gradient from 80:20 hexane-EtOAc to EtOAc)

실험 절차

Step 1 A solution of 3-bromo-2-methylaniline (0.67 g, 3.60 mmol) in DCM (18 mL) was treated dropwise with trimethylaluminum (2 M in toluene, 1.801 mL, 3.60 mmol) and the resulting solution was stirred at rt for 30 min. A solution of 3-oxo-1,3-dihydroisobenzofuran-5-carbonitrile (0.573 g, 3.60 mmol) in DCM (18.00 mL) was added and the resulting mixture was stirred at rt overnight. The mixture was diluted with DCM, washed with an aqueous solution of sodium potassium tartrate (Fehling's Reagent II) and water, then was dried and concentrated. The residue was purified by column chromatography (eluting with a gradient from 80:20 hexane-EtOAc to EtOAc) to provide N-(3-bromo-2-methylphenyl)-5-cyano-2-(hydroxymethyl)benzamide as a white solid (170 mg, 14%) which was used without further purification. Mass spectrum m/z 345, 347 (M+H)+.

출처