反应详情

A solution of 480 g (1.89 mol) of 12-oxo-15-pentadecanolide (VI) in 735 ml of methanol is cooled to 10°-15° C. 26.2 g of sodium borohydride are added in portions at this temperature. The mixture is allowed to after-react at 15° C. for a further 2 hours. After addition of water, excess methanol is distilled off. The organic content of the reaction mixture is extracted with toluene, the toluene phase is washed neutral and dried, the toluene is stripped off and the residue is subjected to fractional distillation. 470 g (1.85 mol) of 12-hydroxy-15-pentadecanolide are obtained;

1. customto after-react at 15° C. for a further 2 hours
2. distillationis distilled off
3. extractionThe organic content of the reaction mixture is extracted with toluene
4. washthe toluene phase is washed neutral
5. customdried
6. distillationthe residue is subjected to fractional distillation