Axially asymmetric ester compound and production method thereof
申请人:Tanaka Ken
公开号:US20090299076A1
公开(公告)日:2009-12-03
To provide an axially asymmetric optically active biaryl ester compound that can easily produced without the step of optical resolution which was almost indispensable in conventional methods. There is provided a method for producing an axially asymmetric ester compound, comprising a cycloaddition of a compound having a triple bond with the use of a catalyst containing rhodium metal and an optically active bisphosphine.
Axiallychiral hydroxy carboxylic acid derivatives were successfully synthesized with high yields and ee values by the cationic rhodium(I)/axiallychiral biaryl bisphosphine complex-catalyzed enantioselective [2 + 2 + 2] cycloaddition. Axiallychiral hydroxy and dihydroxy carboxylic acid derivatives, bearing the aryl group at the ortho-position of the alkoxycarbonyl group, were also synthesized with
Palladium-catalyzed asymmetric hydrophosphination of internal alkynes: Atroposelective access to phosphine-functionalized olefins
作者:Danqing Ji、Jierui Jing、Yi Wang、Zisong Qi、Fen Wang、Xuepeng Zhang、Yong Wang、Xingwei Li
DOI:10.1016/j.chempr.2022.08.019
日期:2022.12
Palladium-catalyzed underexplored atroposelective hydrophosphination of sterically hindered internal alkynes with secondary phosphines has been realized, affording C-N axially chiral trisubstituted olefins (vinylphosphines) in excellent regioselectivity, (E)-selectivity, and enantioselectivity. The axial chirality was constructed via the integration of hydrophosphination and dynamic kinetic transformation
空间位阻内部炔烃与仲膦的钯催化未充分探索的阻转选择性氢膦化反应已经实现,以优异的区域选择性、( E )-选择性和对映选择性提供 CN 轴向手性三取代烯烃(乙烯基膦)。轴向手性是通过氢膦化和炔烃的动态动力学转化的整合构建的,对称和非对称仲膦均适用。