unique structure based on an axially chiral biaryl moiety as well as their significant biological activity. Herein, we describe the development of a palladium‐catalyzed atroposelective C−H alkynylation and its application in gram‐scale, stereocontrolled formal syntheses of (+)‐isoschizandrin and (+)‐steganone. tert‐Leucine was identified as an efficient, catalytic transient chiral auxiliary. A wide
二苯并
环辛二烯木脂素是一类有趣的分子,因为它们基于轴向手性联芳基部分的独特结构以及显着的
生物学活性。在本文中,我们描述了
钯催化的对映选择性C-H炔基化的发展及其在(+)-异五味子和(+)-甾烷酮的克级立体控制形式合成中的应用。叔亮
氨酸被认为是一种高效的催化瞬态手性助剂。通过这种方法,可以以良好的收率(高达99%ee)和良好的收率(高达99%)制备各种对映体富集的联芳基化合物 。