PREPARATION OF 2-ARYL-3-SILYL-AND 2-ARYL-3-GERMYL-l,3-BUTADIENES VIA ARYLNICKELATION AND ZINCIOMETHYLATION

摘要

Benzyl 3-silyl(or germyl)propargyl ether,aryl iodide,and bis(iodozincio)methane were assembled in the presence of a nickel catalyst to efficiently give 2-aryl-3-silyl(germyl)-l,3-butadienes via arylnickelation,zinciomethylation,and 1,4-elimination of zinc benzyloxide.As a ligand,an electron-deficient phosphine such as tris(2-furyl)phosphine was effective.