Homocoupling of Polyfluorovinylstannanes Mediated by a Novel Combination of CuCl/2,2''''-Dipyridyl. Stereospecific Syn-thesis of Polyfluorinated Alka-2,4-dienes

Introduction Stille reaction, which is known as the cross-coupling reaction between organostannanes and organic electro-philes, has become a widely employed synthetic tool in organic synthesis for the construction of carbon-carbon single bond,1 particularly in the synthesis of naturally occurring compounds.2 But the homocoupling reaction of vinylstannanes is still limited. Intramolecular CuCl mediated oxidative coupling of alkenyltrimethylstan-nane has been reported3 and applied to the synthe…