An efficient copper(I) complex catalyzed Sonogashira type cross-coupling of aryl halides with terminal alkynes
摘要:
A wide range of arylated alkynes are synthesized from the corresponding aryl halides and terminal alkynes through Sonogashira type cross-coupling reactions through C(aryl)-C bond formation in the presence of a catalytic amount of N,N'-dibenzyl BINAM-Cul complex under mild reaction conditions. (C) 2009 Elsevier Ltd. All rights reserved.
Simple and easily accessible chiral lithium amide salts are reported as efficient (pre)catalysts for the diastereo‐ [up to (E:Z)=92:8] and enantioselective [up to 72% ee (E)] hydroamination/cyclisation of conjugated primary aminodienes. These chiral lithium salts are straightforwardly prepared by in situ combination of an N‐substituted (R)‐(+)‐1,1′‐binaphthyl‐2,2′‐diamine ligand and a commercial methyllithium
Domino synthesis of 2-arylbenzo[b]furans by copper(II)-catalyzed coupling of o-iodophenols and aryl acetylenes
作者:E.A. Jaseer、D.J.C. Prasad、Govindasamy Sekar
DOI:10.1016/j.tet.2010.01.026
日期:2010.3
range of 2-arylbenzo[b]furans are synthesized through domino intermolecular C(aryl)–C(alkynyl) bond formation followed by intramolecular C(alkynyl)–O bond forming cyclization via copper(II)-catalyzed coupling of o-iodophenols and aryl terminal acetylenes. This method requires neither expensive palladium catalyst nor oxophilic phosphine ligands, can tolerate different functional groups. The methodology
Asymmetric Assisted Tandem Catalysis: Hydroamination followed by Asymmetric Friedel-Crafts Reaction from a Single Chiral<i>N</i>,<i>N</i>,<i>N′</i>,<i>N′</i>-Tetradentate Pyridylmethylamine-Based Ligand
the newly designed rare‐earth catalyst of the first reaction is converted into a novel chiral organocatalyst for the second transformation by the simple addition of HCl. The observation of some enantioinduction in the tandem sequence—alkyne hydroamination followed by enantioselective Friedel–Crafts alkylation—confirms the relay of the chiral N,N,N′,N′‐tetradentate ligand and the importance of its pyridylmethylamine
The stereoselective addition of phenyl acetylene to imines, catalysed by chiral bis-amine-Cu(I) complexes was studied. The chiral ligands are either commercially available or easily prepared in one or two steps. This very convenient and extremely simple experimental procedure at room temperature allowed optically active propargyl amines to be obtained in good yields with enantioselectivities up to 70%.
[EN] PROCESS FOR PREPARING DIMERIC PHOSPHAZENE DERIVED BRØNSTED ACIDS<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDES DE BRØNSTED DÉRIVÉS DE PHOSPHAZÈNE DIMÈRE
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2022073803A1
公开(公告)日:2022-04-14
The present invention describes a new synthesis to chiral imidodiphosphoryl compounds, their salts, metal complexes as well as derivatives thereof. Said chiral imidodiphosphoryl compounds can be used as catalysts for Brønsted acid / Brønsted base or Lewis acid / Lewis base mediated transformations.