反应详情

温度

0 °C

To a suspension of aluminium chloride (214 mg; 1.6mmole) in dichloromethane (5 mL) cooled at 0° C. was added 2-(p-methoxy benzyl)-3-methyl-4-hydroxy-5-propyl benzofuran (100 mg; 0.32mmoles). A red solution resulted. To this solution was added dropwise dichloromethylmethylether (87 (1; 0.96 mmole). There was a vigorous reaction and a color change from red to green was observed. Ice and water was then added and the mixture was extracted with ethylacetate. The organic phase was dried (Na2SO4), and concentrated in vacuo and the residue was chromatographed on silica gel. Elution with 10% ethylacetate in hexane yielded 40 mg (37%) of 2-(3 formyl-4-methoxybenzyl)-3-methyl-4-hydroxy-5-propyl-benzofuran.

1. customA red solution resulted
2. customa vigorous reaction
3. extractionthe mixture was extracted with ethylacetate
4. dry with materialThe organic phase was dried (Na2SO4)
5. concentrationconcentrated in vacuo
6. customthe residue was chromatographed on silica gel
7. washElution with 10% ethylacetate in hexane