A novel Pd(II)-catalyzed cascade reaction has been developed that consists of a highly regio- and stereoselective oxa [4 + 2] cycloaddition reaction of o-alkynylbenzaldehydes and an intramolecular carboxylic group quenching of the in situ generated oxonium ion. This new reaction provides a one-step construction of the tetracyclic core structure of chaetophenol C from two simple starting materials.
已开发出一种新型的Pd(II)催化的级联反应,该反应由邻位炔基
苯甲醛的高度区域选择性和立体选择性的oxa [4 + 2]环加成反应和原位产生的氧离子的分子内羧基猝灭组成。这个新的反应从两个简单的原料开始一步一步构建脂木
酚C的四环核结构。发达的
化学方法已成功地用于首次合成全脂木
酚酚C及其数十种类似物。