Nickel/Photoredox-Catalyzed Methylation of (Hetero)aryl Chlorides Using Trimethyl Orthoformate as a Methyl Radical Source
作者:Stavros K. Kariofillis、Benjamin J. Shields、Makeda A. Tekle-Smith、Michael J. Zacuto、Abigail G. Doyle
DOI:10.1021/jacs.0c02805
日期:2020.4.22
represents a valuable transformation, but typically requires harsh reaction conditions or reagents. We report a radical approach for the methylation of (hetero)aryl chlorides using nickel/photoredox catalysis wherein trimethyl orthoformate, a common laboratory solvent, serves as a methylsource. This method permits methylation of (hetero)aryl chlorides and acyl chlorides at an early and late stage with
Parameterization of phosphine ligands demonstrates enhancement of nickel catalysis via remote steric effects
作者:Kevin Wu、Abigail G. Doyle
DOI:10.1038/nchem.2741
日期:2017.8
Ligand development underlies many advances in Pd-catalysed cross coupling but has seen limited application in the growing field of Ni catalysis. Now, a phosphine framework is shown to enable Ni-catalysed Suzuki coupling of acetals. Parameterization studies provide structural insight into ligand success and a quantitative model to facilitate further ligand design.
The Preparation and Hydrolysis of a Dineopentyl Acetal<sup>1</sup>
作者:C. A. MacKenzie、J. H. Stocker
DOI:10.1021/ja01616a076
日期:1955.6
Mechanism of thermolysis of .alpha.-chloro ethers in aprotic solvents
作者:H. Kwart、P. A. Silver
DOI:10.1021/jo00909a004
日期:1975.10
Ni/Photoredox-Catalyzed C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Coupling between Aziridines and Acetals as Alcohol-Derived Alkyl Radical Precursors
作者:Sun Dongbang、Abigail G. Doyle
DOI:10.1021/jacs.2c09294
日期:2022.11.2
available C(sp3) precursors that afford valuable β-functionalized amines upon ring opening. In this article, we report a Ni/photoredox methodology for C(sp3)–C(sp3) cross-coupling between aziridines and methyl/1°/2° aliphatic alcohols activated as benzaldehyde dialkyl acetals. Orthogonal activation modes of each alkyl coupling partner facilitate cross-selectivity in the C(sp3)–C(sp3) bond-forming reaction: