Strongly Reducing, Visible‐Light Organic Photoredox Catalysts as Sustainable Alternatives to Precious Metals
作者:Ya Du、Ryan M. Pearson、Chern‐Hooi Lim、Steven M. Sartor、Matthew D. Ryan、Haishen Yang、Niels H. Damrauer、Garret M. Miyake
DOI:10.1002/chem.201702926
日期:2017.8.16
Photoredox catalysis is a versatile approach for the construction of challenging covalent bonds under mild reaction conditions, commonly using photoredox catalysts (PCs) derived from precious metals. As such, there is need to develop organic analogues as sustainable replacements. Although several organic PCs have been introduced, there remains a lack of strongly reducing, visible-light organic PCs
C–N Cross-Coupling via Photoexcitation of Nickel–Amine Complexes
作者:Chern-Hooi Lim、Max Kudisch、Bin Liu、Garret M. Miyake
DOI:10.1021/jacs.8b03744
日期:2018.6.20
science, biology, and medicine. Transition metal complexes can elegantly orchestrate diverse aminations but typically require demanding reaction conditions, precious metal catalysts, or oxygen-sensitive procedures. Here, we introduce a mild nickel-catalyzed C-N cross-coupling methodology that operates at room temperature using an inexpensive nickelsource (NiBr2·3H2O), is oxygen tolerant, and proceeds
METHODS FOR FORMING ARYL CARBON-NITROGEN BONDS USING LIGHT AND PHOTOREACTORS USEFUL FOR CONDUCTING SUCH REACTIONS
申请人:Colorado State University Research Foundation
公开号:US20190345122A1
公开(公告)日:2019-11-14
The disclosure relates to a method for forming aryl carbon-nitrogen bonds and to photoreactors useful in these and other light-driven reactions. The method comprises contacting an aryl halide with an amine in the presence of a Ni salt catalyst solution and an optional base, thereby forming a reaction mixture; exposing the reaction mixture to light under reaction condition sufficient to produce the aryl carbon-nitrogen bonds. In certain embodiments, the amine may be present in a molar excess to the aryl halide. In certain embodiments, the Ni salt catalyst solution includes a Ni(II) salt and a polar solvent, wherein the Ni(II) salt is dissolved in the polar solvent. In certain embodiments, the reactions conditions include holding the reaction mixture at between about room temperature and about 80° C. for between about 1 hour and about 20 hours such that at least about 50% yield is obtained.
[EN] OPTICALLY ACTIVE 1-(FLUORO-,TRIFLUOROMETHYL-OR TRIFLUOROMETHOXY-SUBSTITUTED PHENYL)ALKYLAMINE N-MONOALKYL DERIVATIVES AND PROCESS FOR PRODUCING SAME<br/>[FR] DERIVES DE 1-( PHENYLE A SUBSTITUTION FLUORO,TRIFLUOROMETHYLE OU TRIFLUOROMETHOXY)ALKYLAMINE N-MONOALKYLE OPTIQUEMENT ACTIFS ET LEUR PROCEDE DE PRODUCTION
申请人:CENTRAL GLASS CO LTD
公开号:WO2004022521A1
公开(公告)日:2004-03-18
An optically active 1-(fluoro-, trifluoromethyl- or trifluoromethoxy-substituted phenyl)alkylamine N-monoalkyl derivative represented by the formula [4] is produced by a process including (a) reacting an optically active secondary amine, represented by the formula [1], with an alkylation agent R2-X, in the presence of a base, thereby converting the secondary amine into an optically active tertiary amine represented by the formula [3]; and (b) subjecting the tertiary amine to a hydrogenolysis, thereby producing the N-monoalkyl derivative,wherein R represents a fluorine atom, trifluoromethyl group or trifluoromethoxy group, n represents an integer of from 1 to 5, each of R1 and R2 independently represents an alkyl group having a carbon atom number of from 1 to 6, Me represents a methyl group, Ar represents a phenyl group or 1- or 2-naphthyl group, * represents a chiral carbon, and X represents a leaving group.