133545-19-4Relevant academic research and scientific papers
Process for preparing oprtically active trimethyllactic acid and its ester
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, (2008/06/13)
The invention relates to a novel process for preparing optically active trimethyllactic acid and/or its esters by catalytic hydrogenation of trimethylpyruvic acid and/or its esters in the presence of noble metal complex catalysts containing phosphorus ligands.
C2-Symmetric sulfur derivatives of 2,2′,3,3′'-tetramethoxybiphenyl
Delogu, Giovanna,Fabbri, Davide,Dettori, Maria Antonietta,Forni, Alessandra,Casalone, Gianluigi
, p. 1451 - 1458 (2007/10/03)
A practical route to prepare dithioether, thiophene and thiophene S-dioxide derivatives of 2,2′,3,3′-tetramethoxy-1,1′-biphenyl 1 is described. Resolution of 6,6′-bis(methylthio)-3,3′-dimethoxy-[1,1′-biphenyl]-2,2′ -diol 15 was achieved and its absolute configuration was assigned by X-ray analysis of the corresponding phosphorothioamidate diastereomer 18.
Chiral phosphorus compounds
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, (2008/06/13)
Novel chiral phosphorus compounds of the formula STR1 wherein R signifies lower alkyl, R1 signifies phenyl and R2 and R3 signify hydrogen or lower alkoxy, which are suitable in the form of complexes with a metal of Group VIII as catalysts for asymmetric hydrogenations and for enantioselective hydrogen displacements in prochiral allylic systems.
Axially Dissymmetric Diphosphines in the Biphenyl Series: Synthesis of (6,6'-Dimethoxybiphenyl-2,2'-diyl)bis(diphenylphosphine) ('MeO-BIPHEP') and Analogues via an ortho-Lithiation/Iodination Ullmann-Reaction Approach
Schmid, Rudolf,Foricher, Joseph,Cereghetti, Marco,Schoenholzer, Peter
, p. 370 - 389 (2007/10/02)
The new axially dissymmetric diphosphines (R)- and (S)-(6,6'-dimethoxybiphenyl-2,2'-diyl)bis(diphenylphosphine) ((R)- and (S)-5a; 'MeO-BIPHEP') and the analogues (R)- and (S)-5b and 5c have been synthesized in enantiomerically pure form.These lignands hav
