Stereoselective Rhodium(I)-Catalyzed C–F Bond Arylation of Tri- and Tetrasubstituted <i>gem</i>-Difluoroalkenes with Boronic Acids
作者:Hao Tan、Yuwei Zong、Yihan Tang、Gavin Chit Tsui
DOI:10.1021/acs.orglett.3c00108
日期:2023.2.10
We herein describe a highly diastereoselective rhodium(I)-catalyzed C–F bond functionalization of gem-difluoroalkenes with arylboronic acids. In contrast to previously developed Pd(II)- and Pd(0)-catalyzed methods, the Rh(I)/BINAP catalytic system enabled the C–F bond arylation of both trisubstituted β,β-difluorostyrenes and tetrasubstituted β,β-difluoroacrylates in >99:1 dr toward the synthesis of
我们在此描述了高度非对映选择性的铑 (I) 催化的偕二氟烯烃与芳基硼酸的 C-F 键功能化。与之前开发的 Pd(II)- 和 Pd(0)- 催化方法相比,Rh(I)/BINAP 催化系统能够实现三取代 β,β-二氟苯乙烯和四取代 β,β-二氟丙烯酸酯的 C-F 键芳基化在 >99:1 dr 中合成有价值的单氟烯烃。实验和计算研究表明,[Rh(I)-Ar] 物种具有合理的迁移插入/β-F 消除机制。