反应详情

温度

140 °C

In 5 ml of dimethyl sulfoxide were dissolved 1.00 g of 5-acetoxy-4,6-di-t-butyl-2-iodomethyl-2-methyl-2,3-dihydrobenzofuran synthesized in Example 70-2) and 0.36 g of potassium cyanide and the mixture was heated with stirring at 140° C. under nitrogen overnight. After cooling to room temperature, the reaction solution was poured into water and extracted with ether, and the combined organic layers were washed with saturated brine, dried over anhydrous magnesium sulfate, and then concentrated. The residue was purified by silica gel column chromatography eluting with n-hexane containing 9-13% ethyl acetate to give 0.09 g of 4,6-di-t-butyl-2-cyanomethyl-5-hydroxy-2-methyl-2,3-dihydrobenzofuran as a colorless solid (yield 13%).

1. temperaturethe mixture was heated
2. temperatureAfter cooling to room temperature
3. extractionextracted with ether
4. washthe combined organic layers were washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated
7. customThe residue was purified by silica gel column chromatography
8. washeluting with n-hexane containing 9-13% ethyl acetate