反应详情

2.5 g of ethyl 3-(4-chlorobenzoylamino)-3-isovalerylpropionate, 10 ml of dimethylformamide and 2.3 g of phosphorus oxychloride are treated in the same manner as described in Example 1. 1.5 g of ethyl 2-[2-(4-chlorophenyl)-5-isobutyl-4-oxazolyl]acetate are thereby obtained. Yield: 63.3%.