Alkenyl iodides 1-Alkenyllithiums

Alkenyl fluorides.1 Alkenyllithium compounds, obtained from reaction of alkenyl iodides with J-butyllithium, are converted into alkenyl fluorides by reaction with an N-f-butyl-N-fluorobenzenesulfonamide (1) in THF/ether/pentane at -120 - 20° yields 71-88%. 

The heptenylsilanols [E)-32 and Z)-32 are synthesized by established procedures as outlined in Scheme 7.11 [31]. In both cases, reaction of the appropriate alkenyllithium agent with hexamethylcyclotrisiloxane (D3) produces the desired dimethylsilanols in good yield and with high geometrical purity from a variety of aryl and alkenyl iodides (Scheme 7.11). 

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