Cyclopropylmagnesium chloride

Chlorocyclopropyl phenyl sulfoxide undergoes exchange reaction to afford 1-chloro-cyclopropylmagnesium chloride (a magnesium carbenoid) that reacts with A -lithioaryl-amines to give o-cyclopropylarylamines. ... 

Many cyclopropyl halides, mainly bromides, but also some chlorides, have been converted to alkylcyclopropanes by replacement of the halide. The yields reported are usually well above 50%. Several types of reactions have been utilized to achieve such substitution. When simple halocyclopropanes are used, the halides are converted to the corresponding cyclopropyllithium compounds or cyclopropylmagnesium halides, which undergo alkylation when treated with electrophiles such as alkyl halides, dimethyl sulfate, and tropenylium tetrafluoroborate. Following this strategy 3-bromo-l,l,2,2-tetramethylcyclopropane, bromocyclopropane and (la,2/I,3a)-1-bromo-2,3-dimethyl-l-phenylcyclopropane were transformed to 1,1,2,2,3-penta-... 

Tricyclopropylbismuth and dicyclopropylbismuth chloride are obtained by reaction of cyclopropylmagnesium bromide with Bids according to the required stoichiometry. These organobismuth compounds are useful for iV-cyclopropylation of lactams such as phenanthridinone. ... 

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