反应详情

36 g of methyl 5-formylvalerate, 90 g of water and 1 g of p-toluene sulfonic acid were refluxed for 8 hours, the methanol formed being distilled off constantly. Fractional distillation under reduced pressure gave 13.3 g (yield 41% of theory) of 5-formylvaleric acid.

1. distillationbeing distilled off constantly
2. distillationFractional distillation under reduced pressure