copper (I) cyanide 1.) cyclohexane, THF, -30 to -10 deg C, 2.) THF, -78 deg C, 1 h; Yield given. Multistep reaction;

copper (I) cyanide 1.) ether, THF, -30 to -10 deg C, 2.) THF, 0 deg C; Yield given. Multistep reaction;

copper (I) cyanide in diethyl ether T=-78°C; 1 h; effect of stoichiometries, temperature, solvent; further organocuprates; stereoselectivity of monosubstitution; Product distribution;