Palladium-Catalysed Coupling Reactions: (<i>Z</i>)-Vinyl (<i>N,N</i>-Diisopropyl)carbamate Group as an Efficient Precursor of a (<i>Z</i>)-Vinyl Triflate Function
(diisopropyl)carbamate group, generated from a Hoppe allylation reaction, was easily transformed either into the corresponding (Z)-vinyl phosphate or (Z)-vinyl triflate function in good yield and high selectivity. It was also shown that the result- ing (Z)-vinyl triflate compound could be utilized successfully in palladium-catalysed coupling reactions with vinyl-, phenyl- and acetylenic tin derivatives, without
reagents, under Wenkert Nickel-catalysed conditions, gave access to several substituted (Z)-alkenyl derivatives. These Nickel-catalysed reactions, carried out with vinyl-, phenyl-, p-methoxyphenyl-, trimethylsilylmethylmagnesium bromide and benzylmagnesiumchloride, led to the corresponding (Z)-alkenyl derivatives in good yields and high stereoselectivities.