反应详情

To a stirred mixture of 22 parts of methyl 2,4-dichlorobenzeneacetate and 135 parts of N,N-dimethylformamide are added 3.1 parts of a sodium hydride dispersion 78% while nitrogen gas is introduced. After stirring till foaming has ceased, there are added 15 parts of 2-bromopropane and the whole is stirred for 3 hours at room temperature. The reaction mixture is poured onto water and the product is extracted twice with 2,2'-oxybispropane. The combined extracts are washed with water, dried, filtered and evaporated, yielding 24.5 parts (94%) of methyl 2,4-dichloro-α-(1-methylethyl)benzeneacetate as a residue.

1. additionis introduced
2. stirringthe whole is stirred for 3 hours at room temperature
3. additionThe reaction mixture is poured onto water
4. extractionthe product is extracted twice with 2,2'-oxybispropane
5. washThe combined extracts are washed with water
6. customdried
7. filtrationfiltered
8. customevaporated