A Catalytic Dual Isomerization/Allylboration Sequence for the Stereoselective Construction of Congested Secondary Homoallylic Alcohols
作者:Yangbin Liu、Clément Mazet
DOI:10.1021/acs.joc.0c00565
日期:2020.4.17
homoallylboronates into (chiral) aldehydes and allylboronates, respectively. In the same flask, a chiral Brønsted acid is added next to engage the isomerization products into a stereocontrolled allylboration reaction. Structural variations have been performed on both the allylic alcohols and the homoallylboronates. This mild process affords an array of stereochemically congested and complex chiral secondary
报道了具有相邻的季(立体)中心的均烯丙基醇的非对映和对映选择性制备的催化序列。一锅法依赖于使用单个(非手性或手性)铱配合物来催化伯烯丙基醇和高烯丙基硼酸酯的同时异构化为(手性)醛和烯丙基硼酸酯。在同一烧瓶中,接着添加手性布朗斯台德酸,使异构化产物参与立体可控的烯丙基硼化反应。已经对烯丙基醇和高烯丙基硼酸酯进行了结构变化。这种温和的过程以高收率,优异的非对映选择性和通常较高的对映选择性提供了一系列立体化学富集和复杂的手性仲均烯丙基醇。