具有立体生成硫原子的手性亚砜亚胺是药物发现中很有希望的主题。我们报告了一种有效的方法,通过基于C H H官能化的动力学拆分来访问手性亚砜肟。配备了手性Cp x配体的铑(III)络合物选择性地与邻苯二甲酰苯丙氨酸一起参与仅两个磺胺嘧啶对映体之一的CH活化。中间体可与各种重氮化合物反应,从而获得具有合成上有价值的取代模式的手性1,2-苯并噻嗪。以高产率和对映选择性优良,获得两个亚磺酰亚胺和1,2-苯并噻嗪,与小号值最高可达200。该方法的实用性通过两种药理相关激酶抑制剂的关键中间体的合成得以说明。
An efficient kineticresolution of sulfoximines with enals was realized using chiral N-heterocyclic carbene (NHC) catalysts. The stereoselective amidation proceeds without additional acyl transfer agent. Both enantiomers of the sulfoximines can be obtained with excellent ee values (up to 99% ee and -97% ee, respectively). Performing the catalysis on a gram scale allowed using the recovered sulfoximine
使用手性 N-杂环卡宾 (NHC) 催化剂实现了亚砜亚胺与烯醛的有效动力学拆分。立体选择性酰胺化无需额外的酰基转移剂即可进行。可以获得具有优异 ee 值的亚砜亚胺的两种对映异构体(分别高达 99% ee 和 -97% ee)。在 FXa 抑制剂 F 的不对称合成中使用回收的亚砜亚胺 (+)-1j 进行克级催化。
Ir(III)-Catalyzed Asymmetric C–H Activation/Annulation of Sulfoximines Assisted by the Hydrogen-Bonding Interaction
作者:Jun-Yi Li、Pei-Pei Xie、Tao Zhou、Pu-Fan Qian、Yi-Bo Zhou、Hao-Chen Li、Xin Hong、Bing-Feng Shi
DOI:10.1021/acscatal.2c00962
日期:2022.8.5
asymmetric C–Hactivation reactions generally rely on the design of ligands with sterically bulky groups to create a chiral environment for enantioinduction through steric repulsion. Here we describe an Ir(III)-catalyzed asymmetric C–Hactivation enabled by noncovalent interactions. A broad range of sulfur-stereogenic sulfoximines was prepared in high yields with excellent enantioselectivitiesvia the asymmetric
Efficient Kinetic Resolution of Sulfur‐Stereogenic Sulfoximines by Exploiting Cp
<sup>X</sup>
Rh
<sup>III</sup>
‐Catalyzed C−H Functionalization
作者:Marcus Brauns、Nicolai Cramer
DOI:10.1002/anie.201904543
日期:2019.6.24
atoms are promising motifs in drug discovery. We report an efficient method to access chiral sulfoximines through a C−H functionalization based kinetic resolution. A rhodium(III) complex equipped with a chiral Cpx ligandselectively participates in conjunction with phthaloyl phenylalanine in the C−H activation of just one of the two sulfoximine enantiomers. The intermediate reacts with various diazo compounds
具有立体生成硫原子的手性亚砜亚胺是药物发现中很有希望的主题。我们报告了一种有效的方法,通过基于C H H官能化的动力学拆分来访问手性亚砜肟。配备了手性Cp x配体的铑(III)络合物选择性地与邻苯二甲酰苯丙氨酸一起参与仅两个磺胺嘧啶对映体之一的CH活化。中间体可与各种重氮化合物反应,从而获得具有合成上有价值的取代模式的手性1,2-苯并噻嗪。以高产率和对映选择性优良,获得两个亚磺酰亚胺和1,2-苯并噻嗪,与小号值最高可达200。该方法的实用性通过两种药理相关激酶抑制剂的关键中间体的合成得以说明。