反应详情

In 5 ml of a saturated solution of hydrogen chloride in methanol was dissolved 0.20 g of 4,6-di-t-butyl-2-methyl-5-trimethylsilyloxy-2,3-dihydrobenzofuran-2-carboxylic acid at room temperature and the mixture was stirred for 3 hours, then the reaction solution was concentrated. The residue was purified on a short column of silica gel eluting with n-hexane containing 16% ethyl acetate to give 0.15 g of 4,6-di-t-butyl-5-hydroxy-2-methoxycarbonyl-2-methyl-2,3-dihydrobenzofuran as a colorless powder.

1. concentrationthe reaction solution was concentrated
2. customThe residue was purified on a short column of silica gel eluting with n-hexane containing 16% ethyl acetate