1981
DOI: 10.1002/chin.198136130
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ChemInform Abstract: RHODIUM(I) CATALYZED ASYMMETRIC HYDROGENATION OF α‐ACETAMIDOCINNAMIC ACID WITH MONOMERIC AND POLYMERIC AMINOPHOSPHINES

Abstract: Hydrierungsversuche von α‐Acetamidozimtsäure (I) zu (III) mit dem aus dimerem Chlorocycloocten‐Rh und 1(R)‐Phenyl‐1‐diphenylphosphino‐2(S)‐(N‐methyl‐N‐benzoyl)‐aminopropan (II) gebildeten Rh(I)‐Komplex in situ zeigen, daß die sehr langsame Hydrierung mit optischen Ausb. bis zu 77% (THF/NEt3 , l at. H2, 20°C ; Rh: (II) = 1:2) verläuft.

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“…The reduction of N-acetyl-a-aminocinnamic acid in the presence of [Rh(C 8 H 14 )Cl] 2 and the ligand 53 gives the product in an optical yield reaching 77%. 94 Ligands 54, 55a,b, 56, 57a,b, 58 and 59a,b 95,96 have been used in the hydrogenation of N-acetyl-a-aminocinnamic and N-benzoyl-aaminocinnamic acids in the presence of [Rh(C 6 H 8 )Cl] 2 . The maximum optical yield (68%) was attained in the case of (S)-1-[2-(methyl-tert-butylphosphino)phenyl]ethylamine (58).…”
Section: Other Groups Of Chiral Pn-bidentate Ligandsmentioning
confidence: 99%
“…The reduction of N-acetyl-a-aminocinnamic acid in the presence of [Rh(C 8 H 14 )Cl] 2 and the ligand 53 gives the product in an optical yield reaching 77%. 94 Ligands 54, 55a,b, 56, 57a,b, 58 and 59a,b 95,96 have been used in the hydrogenation of N-acetyl-a-aminocinnamic and N-benzoyl-aaminocinnamic acids in the presence of [Rh(C 6 H 8 )Cl] 2 . The maximum optical yield (68%) was attained in the case of (S)-1-[2-(methyl-tert-butylphosphino)phenyl]ethylamine (58).…”
Section: Other Groups Of Chiral Pn-bidentate Ligandsmentioning
confidence: 99%
“…Zur Fixierung von Metallcarbonylverbindungen wurden bisher vor allem N-und PLiganden verwendet [2]. In Fortführung unserer Untersuchungen über polymere Metallkomplexe [3,4] berichten wir über die Synthese von Polystyrolderivaten mit Isocyanidfunktionen und die Fixierung von Metallcarbonylen auf diesen Trägern.…”
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