反应详情

Diisopropylethylamine (2.1 ml) was added to a solution of 6-(benzyloxy)methyl-3,5-dimethyl-4-hydroxy-2H-pyran-2-one (2.60 g) in THF (50 ml), and after stirring the mixture at room temperature for one hour, chloromethyl methyl ether (921 μl) was added at 0° C. and the mixture was stirred at room temperature for one hour. After concentrating the reaction solution under reduced pressure, water was added to the residue, extraction was performed with AcOEt, and the organic layer was dried with Na2SO4 and then filtered and concentrated. The residue was purified by silica gel column chromatography (n-hexane/AcOEt=5/1→1/1) to obtain 6-(benzyloxy)methyl-3,5-dimethyl-4-methoxymethoxy-2H-pyran-2-one.

1. stirringthe mixture was stirred at room temperature for one hour
2. concentrationAfter concentrating the reaction solution under reduced pressure, water
3. additionwas added to the residue, extraction
4. dry with materialthe organic layer was dried with Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by silica gel column chromatography (n-hexane/AcOEt=5/1→1/1)