反应详情

To a stirred and cooled (water-bath) suspension of 7 parts of a sodium hydride dispersion 78% and 75 parts of dimethylsulfoxide is added dropwise, during a 30 minutes-period, a solution of 37 parts of 2,4-dichlorobenzeneacetonitrile in 100 parts of dimethylsulfoxide. The whole is stirred for 30 minutes while cooling in a water-bath. Then there is added dropwise, during a 30 minutes-period, a solution of 56 parts of 1-bromo-4-(2-bromoethoxy)benzene in 125 parts of dimethylsulfoxide and stirring is continued for another 30 minutes. The reaction mixture is poured onto water and the product is extracted twice with 2,2'-oxybispropane. The combined extracts are washed twice with water, dried, filtered and evaporated. The residue is triturated in petroleumether. The product is filtered off and crystallized from ethanol, yielding 38 parts of α-[2-(4-bromophenoxy)ethyl]-2,4-dichlorobenzeneacetonitrile; mp. 73.9° C.

1. temperaturecooled
2. additionis added dropwise, during a 30 minutes-period
3. stirringThe whole is stirred for 30 minutes
4. temperaturewhile cooling in a water-bath
5. additionThen there is added dropwise, during a 30 minutes-period
6. additionThe reaction mixture is poured onto water
7. extractionthe product is extracted twice with 2,2'-oxybispropane
8. washThe combined extracts are washed twice with water
9. customdried
10. filtrationfiltered
11. customevaporated
12. customThe residue is triturated in petroleumether
13. filtrationThe product is filtered off
14. customcrystallized from ethanol