A remarkable regiocontrol in the palladium-catalyzed silylstannylation of fluoroalkylated alkynes--highly regio- and stereoselective synthesis of multi-substituted fluorine-containing alkenes.

On treating fluorine-containing internal alkynes with 1.2 equiv. of (trimethylsilyl)tributyltin in the presence of 2.

Rhodium-catalyzed [2+2+2] cycloaddition of various fluorine-containing alkynes--novel synthesis of multi-substituted fluoroalkylated aromatic compounds.

Treatment of various fluorinated internal alkynes with 10 mol% of RhCl(3).H(2)O and 30 mol% of i-Pr(2)NEt in toluene at the reflux temperature for 18 h gave the corresponding trimerization products as an isomeric mixture in high yields. Cycloaddition using 1.

An efficient protocol for the stereoselective construction of multisubstituted fluorine-containing alkenes. A palladium-catalyzed bisstannylation of fluorinated internal alkynes.

On treatment of various fluorinated internal alkynes with 1.2 equiv of hexabutylditin under the influence of 2.5 mol % of Pd(t-BuNC)(2)Cl(2) in THF at room temperature for 4 h, the bisstannylation proceeded smoothly to afford the corresponding bisstannylated cis-adducts in high yields.