An Improved System for the Aqueous Lipshutz-Negishi Cross-Coupling of Alkyl Halides with Aryl Electrophiles
作者:Vasudev R. Bhonde、Brian T. O'Neill、Stephen L. Buchwald
DOI:10.1002/anie.201509341
日期:2016.1.26
development of a palladacyclic precatalyst supported by a new biaryl(dialkyl)phosphine ligand (VPhos) in combination with octanoic acid/sodium octanoate as a simple and effective surfactant system provided an improved catalyst system for the rapid construction of a broad spectrum of alkylated scaffolds from alkyl zinc reagents generated in situ.
A Practical Method for Continuous Production of sp3‐Rich Compounds from (Hetero)Aryl Halides and Redox‐Active Esters
作者:Eiichi Watanabe、Yiding Chen、Oliver May、Steven V. Ley
DOI:10.1002/chem.201905048
日期:2020.1.2
practically useful coupling reaction between aromatic halides and redox-active esters was realized by nickel catalysis through the use of a packed zinc bed column in continuous flow. Multiple reuse of the column showed a negligible decrease in efficiency, affording high space/time yields. A wide range of substrates, including a number of heteroaryl halides and polyfunctional materials were coupled in generally
Reductive Cross-Coupling of Nonaromatic, Heterocyclic Bromides with Aryl and Heteroaryl Bromides
作者:Gary A. Molander、Kaitlin M. Traister、Brian T. O’Neill
DOI:10.1021/jo500905m
日期:2014.6.20
Reductive cross-coupling allows the directC–Cbond formation between two organic halideswithout the need for preformation of an organometallic reagent. A method has been developed for the reductive cross-coupling of nonaromatic, heterocyclic bromides with aryl or heteroaryl bromides. The developed conditions use an air-stable Ni(II) source in the presence of a diamine ligand and a metal reductant
Engaging Nonaromatic, Heterocyclic Tosylates in Reductive Cross-Coupling with Aryl and Heteroaryl Bromides
作者:Gary A. Molander、Kaitlin M. Traister、Brian T. O’Neill
DOI:10.1021/acs.joc.5b00135
日期:2015.3.6
A method has been developed for the introduction of nonaromatic heterocyclic structures onto aryl and heteroaryl bromides using alkyl tosylates in a reductive cross-coupling manifold. This protocol offers an improvement over previous methods by utilizing alkyl tosylate coupling partners that are bench-stable, crystalline solids that can be prepared from inexpensive, commercially available alcohols.
Ni/Photoredox-Catalyzed C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Cross-Coupling of Alkyl Pinacolboronates and (Hetero)Aryl Bromides
作者:Anthony N. Cauley、Antonio Ramirez、Chandan L. Barhate、Andrew F. Donnell、Purnima Khandelwal、Melda Sezen-Edmonds、Trevor C. Sherwood、Jack L. Sloane、Cullen L. Cavallaro、Eric M. Simmons