highlighted the aptitude of the titanacyclopropanes to undergo ligand exchange with olefins. This discovery was important, because it gave access to cyclopropanols more functionalized by making economic use of the Grignard of which normally at least two equivalents should have been engaged to obtain good yields. Cha and its team introduced the use of cyclic Grignard reagents, particularly adapted for these reactions. The methodology has been extended to intramolecular reactions De Meijere variation With amides instead of esters the reaction product is an aminocyclopropane in the De Meijere variation The intramolecular reaction is also known: Szymoniak variation In the Szymoniak variation the substrate is a nitrile and the reaction product a cyclopropane with a primary amine group. The reaction mechanism is akin the Kulinkovich reaction: Additional reading References Carbon-carbon bond forming reactions Coupling reactions Titanium Name reactions