A Stereoselective Synthesis of 7-(syn)-Substituted Norcara-2-Enes

Abstract

General synthetic methods for 7-mono substituted norcaranes and its derivatives are carbene adition reactions to cyclohexenes. The reactions have several merits for the syntheses but they have not high selectivity of orientation of the substituents. Especially, it seems to be very difficult to obtain syn-substituted product in excellent yield by the reactions.