Preparation of New Functionalized Cyclopropylmagnesium Reagents We thank the Deutsche Forschungsgemeinschaft (Leibniz program) and the G.I.F. (German-Israeli Foundation for Scientific Research and Development (I-535-083.05/97) for financial support. We are grateful to BASF AG (Ludwigshafen), Chemetall GmbH (Frankfurt), and Degussa AG (Hanau) for generous gifts of chemicals.