A palladium-catalyzed reaction of vinylarenes, allyl ethers, and 1,5-dienes with pinacol proceeded via a selective anti-Markovnikov nucleophilic attack to afford corresponding terminal acetals as major products. The bulkiness of pinacol was found to be critical in controlling the regioselectivity.
通过
钯催化的反应,
乙烯基芳烃、
烯丙基醚和1,5-二烯与
频哪醇作用,经过选择性的反马科夫尼科夫亲核攻击,主要得到相应的末端
缩醛产物。发现
频哪醇的体积大小对区域选择性的控制至关重要。