反应详情

4-methyl-2(N-butylisobutyramido)oxazole (15 g., 0.067 m.) in dry methylene chloride (100 c.c.) was cooled to 0° C. during the addition of m-chloroperbenzoic acid (16 g., 0.023 m.) over 1 hour. The mixture was then stirred at room temperature for 40 hours. The precipitated m-chlorobenzoic acid was then filtered off and the filtrate evaporated to dryness. The residue was taken in ether (100 c.c.) and stirred with 5% aqueous sodium sulphite solution for1 hour. The organic phase was then separated and washed successively with aqueous sodium carbonate (×2) and water, and then dried and evaporated to give a brown oil, 13.9 g.

1. filtrationThe precipitated m-chlorobenzoic acid was then filtered off
2. customthe filtrate evaporated to dryness
3. stirringstirred with 5% aqueous sodium sulphite solution for1 hour
4. customThe organic phase was then separated
5. washwashed successively with aqueous sodium carbonate (×2) and water
6. customdried
7. customevaporated
8. customto give a brown oil, 13.9 g