The reaction of (N-aryl-N-hydroxy)acylacetamides 11 with p-nitrobenzenesulfonyl chloride in the presence of 2 eq of triethylamine gave 5-alkyl-3-aryl-4-oxazolin-2-ones 10. In the same manner, 5-alkyl-3-aryl-4-halogeno-4-oxazolin-2-ones 14 were synthesized from the corresponding N-aryl-N-hydroxy-α-halogeno-acylacetamides 12, which were prepared by chlorination or bromination of (N-aryl-N-hydroxy)acylacetamides 11.
在 2 等量
三乙胺存在下,(N-芳基-N-羟基)酰基乙酰胺 11 与
对硝基苯磺酰氯反应,得到 5-烷基-3-芳基-4-
恶唑啉-2-酮 10。以同样的方法,从相应的 N-芳基-N-羟基-α-卤代-酰基乙酰胺 12 合成了 5-烷基-3-芳基-4-卤代-4-
恶唑啉-2-酮 14,后者是通过(N-芳基-N-羟基)酰基乙酰胺 11 的
氯化或
溴化制备的。