由市售或合成的氨基醇制备一系列对映体纯的2- [2-(二芳基膦基)芳基]-恶唑啉。对于恶唑啉的形成,采用了三种程序:(i)与2-卤代苯甲酸一锅缩合,(ii)ZnCl 2与2-卤代苯甲腈-苯胺催化缩合,和(iii)通过2-卤代苯甲酰胺的三步顺序和甲苯磺酸盐或氯化物。通过非对映选择性亲核取代Ar 1 Ar 2 PC1的卤化物或通过LiPAr 1 Ar 2亲核芳族取代制备含有立体异构磷的膦恶唑啉。另外,制备了硫和硒类似物。
由市售或合成的氨基醇制备一系列对映体纯的2- [2-(二芳基膦基)芳基]-恶唑啉。对于恶唑啉的形成,采用了三种程序:(i)与2-卤代苯甲酸一锅缩合,(ii)ZnCl 2与2-卤代苯甲腈-苯胺催化缩合,和(iii)通过2-卤代苯甲酰胺的三步顺序和甲苯磺酸盐或氯化物。通过非对映选择性亲核取代Ar 1 Ar 2 PC1的卤化物或通过LiPAr 1 Ar 2亲核芳族取代制备含有立体异构磷的膦恶唑啉。另外,制备了硫和硒类似物。
P-Stereogenic Phosphorus Compounds: Effect of Aryl Substituents on the Oxidation of Arylmethylphenylphosphanes under Asymmetric Appel Conditions
作者:Kamalraj V. Rajendran、Lorna Kennedy、Declan G. Gilheany
DOI:10.1002/ejoc.201000733
日期:2010.10
The effects of aryl ringsubstitution on the dynamic resolution of aryl(methyl)phenylphosphanes under asymmetric Appel reaction conditions have been studied. As expected, substitution at the ortho position strongly affects the degree ofstereoselection that can be achieved. Unexpectedly, however, there was no variation of stereoselectivity with the electronic nature of the para substituents, which suggests
Racemic tertiary phosphines are obtained from dichlorophenylphosphine by a “one pot” synthesis in two steps: (1) condensation of one equivalent of an organocadmium, and (2) substitution of the second chlorine by another organometallic compound.
High Asymmetric Induction with β-Turn-Derived Palladium Phosphine Complexes
作者:Scott J. Greenfield、Anton Agarkov、Scott R. Gilbertson
DOI:10.1021/ol035097j
日期:2003.8.1
[reaction: see text] Work toward the development of a bisphosphine ligand system for the palladium-catalyzed addition to cyclic allyl acetates is reported. A parallel approach using phosphine-containing amino acids in conjunction with natural amino acids was used to develop a selective ligand system. The ligand system was examined while attached to the polymer support as well as in solution. Selectivites
[DE] VERFAHREN ZUR ASYMMETRISCHEN SYNTHESE<br/>[EN] METHOD FOR ASYMMETRIC SYNTHESIS<br/>[FR] PROCEDE DE SYNTHESE ASYMETRIQUE
申请人:BASF AG
公开号:WO2005051964A1
公开(公告)日:2005-06-09
Die vorliegende Erfindung betrifft ein Verfahren zur asymmetrischen Synthese in Gegenwart eines chiralen Katalysators, umfassend wenigstens einen Komplex eines Metalls der VIII. Nebengruppe mit zur Dimerisierung über nichtkovalente Bindungen befähigten Liganden, solche Katalysatoren sowie deren Verwendung.
The first chiral ligand library based on self-assembly through complementary hydrogen-bonding was realized. From a 10 x 4 ligand library, catalysts that show excellent activity and enantioselectivity for the asymmetric rhodium-catalyzed hydrogenation have been identified.
实现了第一个基于互补氢键自组装的手性配体库。从 10 x 4 配体库中,已鉴定出对不对称铑催化氢化显示出优异活性和对映选择性的催化剂。