反应详情

2.8 g of ethyl 3-(4-chlorobenzoylamino)-3-(2-thienylcarbonyl)propionate, 10 ml of dimethylformamide and 1.4 g of phosphorus oxychloride are treated in the same manner as described in Example 1. 2.2 g of ethyl 2-[2-(4-chlorophenyl)-5-(2-thienyl)-4-oxazolyl]acetate are thereby obtained.