反应详情

温度

-78 °C

0.95 g of 3-ethoxycarbonyl-5-[(2,4-dichlorophenoxy)methyl]-1,2,4-oxadiazole was added to 30 ml of tetrahydrofuran. The mixture was cooled to -78° C., and then 3 ml of ethylmagnesium bromide (2M solution) was added dropwise. After the mixture was stirred at -78° C. for 1 hour, it was poured into cold aqueous 5% HCl solution. After the resulted product was extracted with ether and concentrated, it was purified by column chromatography(hexane:ethylacetate=4:1) to obtain 0.75 g of the desired product(yield: 83.0%).

1. extractionAfter the resulted product was extracted with ether
2. concentrationconcentrated
3. customit was purified by column chromatography(hexane:ethylacetate=4:1)