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
通过与
二乙基锌反应,将烯基
碲化物转化为相应的烯基
锌化合物。交换反应在室温下在THF中有效进行,同时保留起始
碲化物的立体
化学。在Pd(PPh 3)4存在下,形成的链烯基
锌与
4-碘甲苯的连续反应提供了作为单一立体异构体的交叉偶联产物。