branched and conjugated dienyne structure has been developed, starting from a readily available mono-silylated unsaturated amide and nitrile with an enyne structure. A nucleophilic hydrohalogenation of the triple bond of the enynes with NaI afforded a Z,E-iododienamide and a Z,E-iododienenitrile that, subjected to palladium-catalyzedcross-coupling reactions with a variety of terminalalkynes, led directly
A straightforward approach to unsaturated carboxylic acid derivatives starting from bis-silylated precursors
作者:Annalisa De Girolamo、Vito Fiandanese、Giuseppe Marchese、Angela Punzi
DOI:10.1016/s0040-4020(98)00759-5
日期:1998.10
unsaturated carboxylic acid derivatives, such as amides, nitriles and esters, has been developed, starting from easily accessible bis-silylated precursors. The key step was based upon the reaction of a bis-silylated diene and a bis-silylated enyne with chlorosulphonyl isocyanate, which afforded mono-silylated amides, easily converted into substituted nitriles and esters.