The nucleophilic ring opening of geminally activated cyclopro- panes is a potentially useful reaction in the synthesis of natural products and prostaglandins.1-3 The conjugate addition of alkyl, vinyl, and allyl groups to cyclopropanes activated by two electron-withdrawing groups by use of organocopper2-s or organoaluminium6 reagents has been described. However, although tne nucleophilic double bond properties of allyl- ... (dt,J7.3 and 7.46, 2H, H2-1'), 1.42 (m, ...
