Reaction of gem-Dibromocyclopropanes

The reaction of gem-dibromocyclopropanes with TiUjMgJi provides the butylated cyclopropylmagnesium species, which react with a variety of electrophiles (Tab. 3.19 and 3.20). 

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Moore, W. R., Ward, H. R. Reactions of gem-dibromocyclopropanes with alkyllithium reagents. Formation of allenes, spiropentanes, and a derivative of bicyclopropylidene. J. Org. Chem. 1960, 25, 2073. 

Halton B, Harvey J. Electrocyclic ring-opening reactions of gem-dibromocyclopropanes in the synthesis of natural products and related compounds. Synlett 2006 1975-2000. 

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