[1,8‐ ef ][1,3]diazocin‐3(2 H )‐ylidene; Ar: Mes=2,4,6‐trimethylphenyl, Dipp=2,6‐diisopropylphenyl or Xyl=2,6‐dimethylphenyl; X=Cl, NCCH3, NTf2) have been synthesized, including the first gold(I) triflimidate complex (5 ) stabilized by an eight‐membered NHC ligand. ...
3. Lee S, Hartwig JF. 2001. Improved Catalysts for the Palladium-Catalyzed Synthesis of Oxindoles by Amide α-Arylation.Rate Acceleration, Use of Aryl Chloride Substrates, and a New Carbene Ligand for Asymmetric Transformations. J. Org. Chem.. 66(10): 3402-3415.https://doi.org/10.1021/jo...
3. Lee S, Hartwig JF. 2001. Improved Catalysts for the Palladium-Catalyzed Synthesis of Oxindoles by Amide α-Arylation.Rate Acceleration, Use of Aryl Chloride Substrates, and a New Carbene Ligand for Asymmetric Transformations. J. Org. Chem.. 66(10): 3402-3415. 4. Stauffer SR, Lee S, ...
Both ligand classes much more commonly adopt the role of spectator, rather than actor ligands, in that they rarely undergo modification during a reaction sequence. To be sure, phosphines can give cyclometalation and P–R bond cleavage [2], [3], and cyclopentadienyl ligands can undergo cyclome...
The analysis of the chemical shifts individuates trends which are due to the oxidation of the metal centre as well as the nature of the trans ligand to the NCN carbon. In detail, the 13C NMR resonances are the most diagnostic data to evaluate the oxidation at the gold centre. In fact,...
(NHC)PMCl2]2 (NHC = SIMes, SIDipp; M = Al, Ga) exhibit dimerization in solid state as well as in solution and exhibit different shapes of the central M2P2 cycle (butterfly or nearly square planar conformation) in solid state, depending on the size of the NHC ligand bound to the ...
and insertion reactivity. Sterically less demanding chiral M–H insertion approaches can be a good solution, indeed high ee (ee = enantiomeric excess) has been achieved by using chiral phosphorus ligand and polar hydride sources as pairs for a redox-active cycle occasionally11,12,13,14(Fig...
Using a palladium–NHC catalyst in deuterated trifluoroacetic acid, one-step ligand-directed ortho-selective H–D exchange of aromatic ketones, amides, and amino acids has been conducted. The Pd–NHC complex tested showed distinguished reactivity compared to other palladium salts, which were ineffective...
5) Ligand[英]['liɡənd,'laiɡənd] [美]['laɪɡənd, 'lɪɡənd] 配体 1. Synthesis of novel ligand bis-(4-hydroxyl-7-methyl-6,7-dihydrothiopheno[2,3-d]pyrimidin-2-methyl)-mythylamine; 新型配体双(4-羟基-7-甲基-6,7-二氢噻吩[2,3-d]嘧啶-2-甲基)甲基胺的合成 ...
We report a general, operationally simple and scalable mechanochemical method for the synthesis of [Cu(Cl)(NHC)] complexes. This solid-state and solvent-less methodology was shown to be applicable to a wide range of NHC ligand precursors... G Pisanò,CSJ Cazin - 《Green Chemistry》 被引量:...