Copper complexes biphenyl

For the cyclization of a vinylogue of diazo ester, the copper complex (102) bearing a biphenyl fc(oxazoline) ligand was found to be the catalyst of choice (Scheme 75).278... 

Corey et al. [42] have developed an interesting new bisoxazoline ligand with a biphenyl backbone [71] which was successfully applied in the key-step of the synthesis of the chemotactic factor sirenin (Scheme 14). The crystalline copper complex 21 emerged as the most effective catalyst for this reaction after extensive screening of a series of chiral Cu and Rh complexes. Other reactions with catalyst 21 have not been reported. 

Corey et al. [19] simultaneously reported similar studies using a2,2 -bis(oxazolyl)-6,6 -dimethyl-l,l -biphenyl as copper(I)triflate chelate. This hgand afforded a stable monomeric chiral Cu(I) complex providing a highly... 

The phosphorescent organic light emitting diodes (PHOLEDs) based on Ir(dmp>py)3 complexes were fabricated by the vacuum deposition technique with the following configuration ITO/copper phthalocyanine (CuPc, 10 nm) as hole injection layer/4,4 -bis[(l-naphthyl)(phenyl)-amino]-l,l -biphenyl (NPD, 40 nm) as hole transport layer/CBP Ir(dmppy)3 (8%) (20 nm) as emissive layer/2,9-dimethyl-4,7-diphenyl-l,10-phenanthroline (BCP, 10 nm) as a hole blocking layer/ tris-(8-hydroxyquinoline)aluminum (Alqs, 40 nm) as an electron transport layer/LiF (1 nm) as electron injection layer/ A1 (100... 

Nitrilotriacetic acid, trisodium salt. See Trisodium NTA monohydrate Trisodium NTA 2,2, 2"-Nitrilotriethanol. See Triethanolamine 2,2, 2"-Nitrilotriethanol copper salt. See Copper-triethanolamine complex 2,2, 2"-Nitrilo [triethyl-tris (3,3, 5,5 -tetra-t-butyl-1,1 -biphenyl-2,2 -diyl) phosphite]... 

Of the complexes, 43 (M = Zn, Co, Ni, Cu, VO, Pd, Pt), only the copper, the vanadyl, the platinum and the palladium complexes showed smectic mesophases. Both plati-num(II) and oxovanadium(IV) complexes containing only a chain on one biphenyl moiety (R = H) exhibit nematic phase [111-113]. 

Simple biphenyls have been obtained by the use of organometallic compounds. The reaction " of the aryl-copper (243) with copper trifluoromethanesulphonate results in excellent yields of biphenyls (Scheme 36) by way of the precursor complex (244). 

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