Donor-acceptor-substituted cyclopropane derivatives and their application in organic synthesis

The manifold synthetic methods and their applications demonstrate considerable growth of the chemistry of D-A cyclopropanes during the last 5 years. Although most of the principles employed have long been known, quite a number of new modifications and variations have been developed that characterize D-A cyclopropanes as extremely versatile and valuable tools for organic synthesis. Their ring opening for the preparation of substituted and functionalized 1,4-dicarbonyl compounds and derivatives thereof is remarkably successful.