ChemInform Abstract: Asymmetric Cyclopropanation of Chiral (1-Dimethoxyphosphoryl-2-phenyl)vinyl p-Tolyl Sulfoxide: A New Synthesis of Enantiomerically Pure 2-Amino-3-phenyl-1-cyclopropane-phosphonic Acid - A Constrained Analogue of Phaclofen.

ChemInform ◽  
2010 ◽  
Vol 33 (32) ◽  
pp. no-no
Author(s):  
Wanda H. Midura ◽  
Marian Mikolajczyk
Keyword(s):  
Phosphonic Acid ◽  
Enantiomerically Pure ◽  
Asymmetric Cyclopropanation ◽  
New Synthesis ◽  
Phenyl Vinyl

ChemInform Abstract: A NEW SYNTHESIS OF PHENYL VINYL SELENIDES

1984 ◽  
Vol 15 (30) ◽  
Author(s):  
D. H. R. BARTON ◽  
G. BASHIARDES ◽  
J.-L. FOURREY
Keyword(s):  
New Synthesis ◽  
Phenyl Vinyl

Enantioselektive Katalyse, XVIII Der Einfluß nicht koordinierter Stereozentren auf die enantioselektive Hydrierung/Enantioselective Catalysis, XVIII The Influence of Non-Coordinated Stereocenters on the Enantioselective Hydrogenation

1998 ◽  
Vol 53 (2) ◽  
pp. 211-223 ◽  
Author(s):  
Ulrich Nagel ◽  
Christoph Roller
Keyword(s):  
Michael Addition ◽  
Enantioselective Hydrogenation ◽  
Palladium Complexes ◽  
Enantioselective Catalysis ◽  
Pyrrolidine Ring ◽  
Enantiomerically Pure ◽  
Stereogenic Centers ◽  
Methyl Phenyl ◽  
Phenyl Vinyl

Abstract 3,4-Bis{[2-(methyl-phenyl-oxophosphanyl)-ethyl]phenyl-phosphanyl}pyrrolidines have be­en synthesized by Michael Addition from the corresponding methyl-phenyl-vinyl-phosphane oxides and 3,4-bis(phenylphosphino)pyrrolidines. For purification of the ligands palladium complexes were used and with the enantiomerically pure ligands Rh complexes have been pre­pared. The catalyst has 6 stereogenic centers. In the hydrogenation of Z-α-acetamidocinnamic acid all six stereogenic centers have an influence on the enantioselectivity. The influence is strongest from the C stereocenters of the pyrrolidine ring. Less important are the stereogenic centers on the coordinated P atoms. The influence of the stereocenters on the non-coordinated P = O groups is the least, but it is not negligible. The ee values obtained with the ligands containing P = O groups are much lower than those obtained with ligands which are substituted only with aryl groups. Ketones are hydrogenated with only low ee’s.

ChemInform Abstract: Heck Reactions of Arenediazonium Salts with Phenyl Vinyl Sulfone: A New Synthesis of Styryl Sulfones.

ChemInform ◽  
2010 ◽  
Vol 33 (6) ◽  
pp. no-no
Author(s):  
Saumitra Sengupta ◽  
Subir Kumar Sadhukhan ◽  
Rajkumar Sunil Singh
Keyword(s):  
Vinyl Sulfone ◽  
Heck Reactions ◽  
New Synthesis ◽  
Arenediazonium Salts ◽  
Phenyl Vinyl

ChemInform Abstract: AMINO PHOSPHONIC ACIDS. IV. NEW SYNTHESIS OF AMINO PHOSPHONIC ACID MONOESTERS

1976 ◽  
Vol 7 (12) ◽  
pp. no-no
Author(s):  
CZESLAW WASIELEWSKI ◽  
MARIA HOFFMANN ◽  
EWA WITKOWSKA
Keyword(s):  
Phosphonic Acid ◽  
Phosphonic Acids ◽  
New Synthesis
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