反应详情

A solution of 1.5 ml of oxalic acid monomethyl ester chloride in 10 ml of methylene chloride is added dropwise to a solution of 3.5 g of 3-(3-bromopropoxy)-aniline and 1.3 ml of pyridine in 40 ml of methylene chloride in the course of 10 minutes. After stirring at room temperature for 2 hours, the mixture is poured onto water and extracted with methylene chloride. The combined extracts are evaporated and the residue is chromatographed on silica gel with methylene chloride/ethyl acetate (10:1). The eluate is evaporated and the residue is crystallised from ether/hexane. Methyl N-[3-(3-bromopropoxy)-phenyl]-oxamate of melting point 90°-91° is obtained.

1. additionthe mixture is poured onto water
2. extractionextracted with methylene chloride
3. customThe combined extracts are evaporated
4. customthe residue is chromatographed on silica gel with methylene chloride/ethyl acetate (10:1)
5. customThe eluate is evaporated
6. customthe residue is crystallised from ether/hexane