Alkenylation and Arylation of Gilman Cuprates

Me2CuLi couples with a variety of alkenyl triflates (bromides, iodides) giving methyl derivatives (Table 16.1), and, in complete analogy, with aryl triflates (bromides, iodides). Occasionally, Me2CuLi also couples with alkenyl or aryl phosphates. 

Many alkenyl triflates (-bromides, -iodides) may be prepared with cis- or trans- and E- or Z-configuration, respectively  

16 Transition Metal-Mediated Alkenylations, Arylations, and Alkynylations 

PhN(S02CF3)2 at the enolate oxygen fixes the previously formed C=C double bond geometries, and the alkenyl triflates E- and Z-B, respectively, are obtained. 

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