sodium in diethyl ether 0.0833333 h; Heating;

n-butyllithium; diisobutylaluminium hydride; zinc(II) chloride; bis(acetylacetonate)nickel(II); triphenylphosphine 1.) THF/hexane; 2.) THF/hexane, 2 h, rt.; Yield given. Multistep reaction;