a vacuum pump which yielded a light brown oil containing 1 1 dichloro cis 2 p hydroxyphenyl 3 phenylcyclopropane a solution of 10 ml of anhydrous diethyl ether 10 0 mmol of crude product of 1 1 dichloro cis 2 p hydroxyphenyl 3 phenylcyclopropane and 0 79 g 10 mmol of pyridine was heated to gentle refluxing acetyl chloride 0 78 g 10 mmol was added by drops very slowly which immediately formed a white precipitate the mixture continued to reflux gently for one hour after all the acetyl chloride was added the reaction flask was cooled in an ice bath while 5 0 ml of water was added by drops the aqueous layer was extracted by using three 10 ml portions of anhydrous diethyl ether the combined ether layer was washed with three 10 ml portions of 5 sulfuric acid and saturated sodium bicarbonate solution it was then dried with sodium sulfate and evaporated to give a dark yellow oil which was purified by column chromatography on silica gel with methylene chloride petroleum ether 3 1 as eluent to yield a yellow oil containing 1 1 dichloro cis 2 p acetoxyphenyl 3 phenylcyclopropane a grignard reagent was prepared with 2 43 g 0 1 mole of magnesium turning and 18 7 g 0 1 mole.