Ligand-Enabled Stereoselective β-C(sp3)–H Fluorination: Synthesis of Unnatural Enantiopureanti-β-Fluoro-α-amino Acids
摘要:
A quinoline-based ligand was shown to promote palladium-catalyzed beta-C(sp(3))-H fluorination for the first time. A range of unnatural enantiopure fluorinated alpha-amino acids were obtained through sequential beta-C(sp(3))-H arylation and subsequent stereoselective fluorination from readily available L-alanine.
Functionalized Polymer-Supported Pyridine Ligands for Palladium-Catalyzed C(sp<sup>3</sup>)–H Arylation
作者:Li-Chen Lee、Jian He、Jin-Quan Yu、Christopher W. Jones
DOI:10.1021/acscatal.6b01774
日期:2016.8.5
transition-metal catalysts for C(sp3)–H bond activation is a current central challenge. One of us previously developed an uncommon example of a homogeneouscatalyst that performs controlled C(sp3)–H arylation using pyridine derivatives as ligands, along with Pd [Science, 2014, 343, 1216–1220]. In this work, we report a functionalizable and tunable polymer support used in the immobilization of pyridine derivatives
Selective C(<i>sp</i>
<sup>3</sup>
)-H Monoarylation Catalyzed by a Covalently Cross-Linked Reverse Micelle-Supported Palladium Catalyst
作者:Caroline B. Hoyt、Li-Chen Lee、Jian He、Jin-Quan Yu、Christopher W. Jones
DOI:10.1002/adsc.201700707
日期:2017.10.25
In this work, we illustrate the performance of a solvated micelle‐supported ligand as a platform for coordination with palladium for C–H arylation. The micelle‐supported ligand is one of the first applications of a micelle‐supported ligand for C–H arylation, and provides a tunable support for future elaboration. The use of a spatially constrained system promoted selectivity trends influenced by both