decarbonylative cyanation of acyl chlorides with trimethylsilylcyanide has been achieved. This transformation is applicable to the synthesis of an array of nitrile compounds bearing a wide range of functional groups under neutral conditions. The step-by-step experimental studies revealed that the reaction sequences of the present catalytic reaction are oxidative addition, transmetalation, decarbonylation
Nickel(II), copper(I) and zinc(II) complexes supported by a (4-diphenylphosphino)phenanthridine ligand
作者:Rajarshi Mondal、Patrick K. Giesbrecht、David E. Herbert
DOI:10.1016/j.poly.2015.10.051
日期:2016.3
with ions of late first-row transition metals nickel, copper and zinc has been explored, leading to the isolation and characterization of an organometallic Ni(II) complex, chloro(1-naphthyl)[(4-diphenylphosphino)phenanthridine]nickel (2), a halide-bridged copper(I) complex, bromo[(4-diphenylphosphino)phenanthridine]copper dimer (3), and a Zn(II) complex, bis(chloro)[(4-diphenylphosphino)phenanthridine]zinc
Nickel Catalyzed Selective Arylation of Geminal Dinitriles: Direct Access to α-Cyano Carbonyl Compounds
作者:Anwesha Bhattacharya、Subhashini V. Subramaniam、Nagesh Kumar Kandukuri、Saravanan Peruncheralathan
DOI:10.1021/acs.joc.3c02595
日期:2024.2.16
The catalytic intermolecular arylation of disubstituted geminal dinitriles with in situ generated arylnickel complexes is disclosed. This method efficiently provides various all-carbon substituted α-cyanocarbonyl compounds without additives and an inert atmosphere. It also demonstrates the arylation of R-BINOL and S-BINOL derived geminal dinitriles, preserving optical purity. Mechanistic studies proved
Air-Stable Nickel Precatalysts for Fast and Quantitative Cross-Coupling of Aryl Sulfamates with Aryl Neopentylglycolboronates at Room Temperature
作者:Ryan L. Jezorek、Na Zhang、Pawaret Leowanawat、Matthew H. Bunner、Nicholas Gutsche、Aleksander K. R. Pesti、James T. Olsen、Virgil Percec
DOI:10.1021/ol503061c
日期:2014.12.19
A library containing 10 air-stable (NiX)-X-II(Aryl)(PCy3)(2) sigma-complexes as precatalysts (X = Cl, Br, OTs, OMs, aryl = 1-naphthyl, 2-naphthyl; X = Cl, 1-acenaphthenyl, 1-(2-methoxynaphthyl), 9-phenanthrenyl, 9-anthracyl) was synthesized and demonstrated to quantitatively cross-couple 2-methoxyphenyl dimethylsulfamate with methyl 4-(5,5-dimethyl-1,3,2-dioxaborinane-2-yl)benzoate at 23 degrees C in dry THF in the presence of K3PO4(H2O)(3.2) in less than 60 min. Lower or higher amounts of H2O in K3PO4 and as received THF mediate the same transformation in a maximum three times longer reaction time.
[EN] PROCESS FOR PREPARING 2-AMINO-5-CYANOBENZOIC ACID DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES D'ACIDE 2-AMINO-5-CYANOBENZOIQUE