反应详情

To a stirred mixture of 5.2 parts of p-(2-thenoyl)hydratropic acid in 50 parts of dry hexamethylphosphoramide are added 0.86 parts of sodium hydride dispersion 55.3% and the whole is stirred for 1.5 hours. Then there are added 3.86 parts of octyl bromide and 0.01 parts of potassium iodide. Upon completion, stirring is continued for 18 hours at room temperature. The reaction mixture is poured onto benzene and the whole is shaken successively twice with water, twice with sodium hydroxide solution and again twice with water. The organic phase is dried, filtered and evaporated. The residue is taken up in ether and stirred with activated charcoal. The latter is filtered off and the filtrate is evaporated again. The residue is purified by column-chromatography with chloroform. The pure fractions are collected and the solvent is evaporated, yielding octyl p-(2-thenoyl)-hydratropate as a residue.

1. stirringUpon completion, stirring
2. waitis continued for 18 hours at room temperature
3. additionThe reaction mixture is poured onto benzene
4. customThe organic phase is dried
5. filtrationfiltered
6. customevaporated
7. stirringstirred with activated charcoal
8. filtrationThe latter is filtered off
9. customthe filtrate is evaporated again
10. customThe residue is purified by column-chromatography with chloroform
11. customThe pure fractions are collected
12. customthe solvent is evaporated