Combinatorial Ligand Assisted Simultaneous Control of Axial and Central Chirality in Highly Stereoselective C−H Allylation
作者:Trisha Bhattacharya、Supratim Ghosh、Subhabrata Dutta、Srimanta Guin、Animesh Ghosh、Haibo Ge、Raghavan B Sunoj、Debabrata Maiti
DOI:10.1002/anie.202310112
日期:2024.1.8
The aim of converging multiple stereocenters in asymmetric catalysis brings exciting avenues for expanding the ‘chiral pool’. With this aim, a dual-cooperative ligand system was developed for controlling two distinct stereo-environment in an atropselective C−H allylation of biaryls. The system leverages a chiral amino acid as a transient-ligand source and chiral phosphoric acid for the early C−H activation
在不对称催化中聚合多个立体中心的目标为扩大“手性池”带来了令人兴奋的途径。为此,开发了一种双协同配体系统,用于控制联芳基的阻转选择性 C−H 烯丙基化中的两个不同的立体环境。该系统利用手性氨基酸作为瞬时配体源,并利用手性磷酸进行早期 C−H 激活步骤。 DFT 研究提出了丰富的机制模型,验证了广泛的实验结果。