4-Chlorobutyryl chloride → Ethyl 4-(4-chloro-1-oxobutyl)-alpha,alpha-dimethylbenzeneacetate

関与物質

反応条件

反応手順

To 700 ml of carbon disulfide containing 36.5 g (0.254 mole) of 4-chlorobutyryl chloride is added 74.5 g (0.56 mole) of aluminum chloride with stirring in an ice bath (about -10° C.). Stirring is continued for about 15 minutes at about 25° C. then the mixture is recooled to 5° C. and 48.4 g (0.294 mole) of ethyl α,α-dimethylphenylacetate in 100 ml of carbon disulfide is added. The reaction mixture is stirred on an ice bath for 31/2 hours then stirred for 151/2 hours at 25° C. then poured into HCl-ice water and extracted with chloroform. The extract is washed with dilute sodium carbonate solution, water and saturated sodium chloride solution, dried over magnesium sulfate, and evaporated giving as a solid ethyl 4-(4-chloro-1-oxobutyl)-α,α-dimethylphenylacetate.

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