methyl 2-(3-methoxy-4-nitrophenyl)-5-methyl-4,5-dihydro-1,3-oxazole-4-carboxylate 、 、
N-溴代丁二酰亚胺(NBS) 在
silica gel 、
chloroform methanol 作用下,
以
苯 为溶剂,
以gave 1.84 g of the title compound as a light yellow solid (51%)的产率得到methyl 2-(3-methoxy-4-nitrophenyl)-5-methyl-1,3-oxazole-4-carboxylate