A New Catalyst for a Pd Catalyzed Alder Ene Reaction. A Total Synthesis of (+)-Cassiol
作者:Barry M. Trost、Yong Li
DOI:10.1021/ja960642f
日期:1996.1.1
conditions. Two variables proved key in the development of a new catalytic system that has proven to be effective, the absence of traditional ligands and the choice of acid. An effective synthesis of (+)-cassiol was accomplished in which this new reaction played a key. A lipase served to introduce the chirality, and a palladium(0) catalyzed reaction was important in elaborating a side chain. The final adjustment
在抗溃疡剂 (+)-cassiol 的合成策略的背景下,探索了钯催化的烯炔环异构化的范围,从而产生了新的催化系统。在模型研究中,六元环形成的影响、系链中羰基的存在以及烯烃的空间位阻共同阻止了“标准”条件下的环异构化。两个变量被证明是开发一种已被证明有效的新催化系统的关键,即传统配体的缺乏和酸的选择。(+)-肉豆蔻醇的有效合成已经完成,其中这一新反应起到了关键作用。脂肪酶用于引入手性,钯 (0) 催化的反应在制作侧链时很重要。