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The addition reactions of α,β-unsaturated carbonyl compounds with dichloromethyl p-tolyl sulfoxide in the presence of NaHMDS or LDA resulted in the formation of adducts, 1-chlorocyclopropyl p-tolyl sulfoxides bearing a carbonyl group at the 2-position, in almost quantitative yields. The carbonyl group of the adducts was transformed to various ether groups to give 1-chlorocyclopropyl p-tolyl sulfoxides...
1-Chlorocyclopropyl p-tolyl sulfoxides bearing an alkoxymethyl group at the 2-position were easily prepared from α,β-unsaturated esters with dichloromethyl p-tolyl sulfoxide and alkylhalides in three steps in good overall yields. Treatment of the 1-chlorocyclopropyl p-tolyl sulfoxides with i-PrMgCl resulted in the formation of 3-oxabicyclo[3.1.0]hexanes in up to 89% yield as a single diastereomer...
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