Tetracyclo[3,3,1,02,4,02,8]nonane. A strained spiro-compound
Abstract
Reaction of the dibromocarbene adduct of 4-vinylcyclohexene with methyl-lithium at –48° to –50° gives the spiro-compound (IV), but by modifying the reaction condition a ready route to the exo-tricyclo-[3,3,1,02,4] ring system is obtained.