Tellurium-zinc exchange reaction. A new preparative method of alkenylzinc reagents

Article abstract of DOI:10.1016/0040-4039(96)00955-0

Alkenyl tellurides were converted to the corresponding alkenylzinc compounds by the reaction with diethylzinc. The exchange reaction proceeds efficiently in THF at room temperature with retention of the stereochemistry of the starting tellurides. The successive reaction of the formed alkenylzinc with 4-iodotoluene in the presence of Pd(PPh₃)₄ afforded a cross-coupling product as a single stereoisomer.