Abstract: Stannylcupration of silylated alkynes or enynes does not proceed under classic conditions, but in the presence of methanol as a proton source the silyl group was removed and stannylation takes place. In order to preserve the silylated alkyne function, stannylcuprations of methyl-substituted alkyne 5 or enynes 12 and 16 were carried out in a competitive reaction in the presence of water in the cuprate solution. High yields and total ...
