反应详情

温度

25 °C

In 200 ml of 99.5% ethanol, was dissolved 24.2 g (0.10 mol) of isobutyl 4-oxodecanoate. Thereto was added 4.2 g (0.11 mol) of sodium borohydride in small quantities, and then the mixture was stirred for 10 minutes at 25° C. The solution was poured into 1 L of water, and 1 L of ethyl acetate was further added thereto followed by stirring to thereby extract the product into the ethyl acetate phase. Ethyl acetate was distilled off followed by vacuum distillation, yielding γ-decalactone (a compound in which R61 represents an n-pentyl group in the above formula (39)). Gas chromatographic analysis showed that the yield of γ-decalactone relative to isobutyl 4-oxodecanoate was 93%. In the resulting γ-decalactone, a plastic-like flavor or acid taste was not observed at all, but it had a good peach-like aroma.

1. additionwas further added
2. stirringby stirring
3. extractionto thereby extract the product into the ethyl acetate phase
4. distillationEthyl acetate was distilled off
5. distillationfollowed by vacuum distillation