反应详情

Utilizing a phase-transfer procedure similar to that described in Example I, phenylsulfonylacetone was reacted with 1,4-dichlorobutene-2 to obtain 1-phenylsulfonyl-1-acetyl-2-vinylcyclopropane. For the reaction, 9.91 grams phenylsulfonylacetone (Parish Chemical Co.) and 6.25 grams 1,4-dichlorobutene-2 were combined in 20 mls sulfolane containing 6.6 grams potassium hydroxide (85%) and 5 mole percent tricaprylylmethylammonium chloride. The reaction mixture was stirred at 35°-40° C. for 31/2 hours. One-hundred mls water was then added to dissolve the white granular precipitate which had formed and the mixture extracted several times with ether. A crude red oil (10.8 grams) was obtained after removal of the ether and further work-up utilizing a Waters Preparatory Liquid Chromatograph 500A equipped with a gel permeation column and operated at a flow rate of 0.1 l/min yielded the cis and trans isomers of 1-phenylsulfonyl-1-acetyl-2-vinylcyclopropane. ##STR18## trans 1-phenylsulfonyl-1-acetyl-2-vinylcyclopropane

1. dissolutionto dissolve the white granular precipitate which
2. customhad formed
3. extractionthe mixture extracted several times with ether
4. customA crude red oil (10.8 grams) was obtained
5. customafter removal of the ether and further work-up
6. customequipped with a gel permeation column