Highly Enantioselective Rh-Catalysed Hydrogenation of 1-Alkyl Vinyl Esters Using Phosphine-Phosphoramidite Ligands
作者:Tina Maria Konrad、Pascal Schmitz、Walter Leitner、Giancarlo Franciò
DOI:10.1002/chem.201303066
日期:2013.9.27
MatPhos, a good mate for hard tasks: The asymmetric hydrogenation of 1‐alkyl vinyl esters, thwarted so far by mediocre ee values and low activities, can now be achieved with MatPhos/Rh catalysts with ee values of 96–99 % for a variety of substrates at low catalyst loadings (0.1–1 mol %) and under mild conditions (5–20 bar H2, room temperature). After hydrolysis, the corresponding chiral secondary alkyl
MatPhos,是完成艰苦任务的理想伴侣:迄今为止,由于中等ee值和低活性,阻碍了1-烷基乙烯基酯的不对称氢化,现在可以使用ee值为96–99%的MatPhos / Rh催化剂来实现在低催化剂负载量(0.1-1 mol%)和温和条件(5-20 bar H 2,室温)下制备底物。水解后,可以高对映体纯度获得相应的手性仲烷基醇,为获得这一重要产品类别提供了一条通用而实用的途径。
Palladium catalyzed indirect electrochemical acetoxylation of olefins
作者:Frederick W. Hartstock、Danial D.M. Wayner
DOI:10.1016/0040-4039(94)88264-9
日期:1994.10
Olefins are acetoxylated to allylic and vinylic unsaturated esters by palladium (II) acetate catalyst in combination with controlled current anodic reoxidation and copper (II) acetate as an electron transfer agent.
PARTICLES COMPRISING AMPHIPHILIC COPOLYMERS, HAVING A CROSS-LINKED SHELL DOMAIN AND AN INTERIOR CORE DOMAIN, USEFUL FOR PHARMACEUTICAL AND OTHER APPLICATIONS
申请人:G.D. Searle & Co.
公开号:EP0907666A1
公开(公告)日:1999-04-14
[EN] PARTICLES COMPRISING AMPHIPHILIC COPOLYMERS, HAVING A CROSS-LINKED SHELL DOMAIN AND AN INTERIOR CORE DOMAIN, USEFUL FOR PHARMACEUTICAL AND OTHER APPLICATIONS<br/>[FR] PARTICULES COMPRENANT DES COPOLYMERES AMPHIPHILES, POSSEDANT UN DOMAINE DE RETICULATION CROISEE ET UN DOMAINE DE NOYAU INTERNE, UTILISABLES EN PHARMACOLOGIE ET AUTRES APPLICATIONS
申请人:——
公开号:WO1997049736A2
公开(公告)日:1997-12-31
[EN] Provided are methods of inhibiting bile acid uptake from the gastrointestinal system and reducing blood serum cholesterol by administering to a mammal, such as a human, an effective amount of particles comprising amphiphilic copolymers, having a cross-linked shell domain and an interior core domain. [FR] La présente invention fournit des méthodes d'inhibition des remontées d'acide biliaire du système gastro-intestinal et permet de réduire le cholestérol de sérum du sang en administrant à un mammifère, tel qu'un humain, une quantité efficace de particules comprenant des copolymères amphiphiles, possédant un domaine de réticulation croisée et un domaine de noyau interne.
Concerted Catalytic Reactions for Conversion of Ketones or Enol Acetates to Chiral Acetates
作者:Hyun M. Jung、Jeong H. Koh、Mahn-Joo Kim、Jaiwook Park
DOI:10.1021/ol9914043
日期:2000.2.1
[reaction: see text] Enol acetates or ketones asymmetrically transformed to chiral acetates in high yields with high optical purities through multistep reactions catalyzed by a lipase and a ruthenium complex. 2,6-Dimethylheptan-4-ol was chosen as a suitable hydrogen donor, and 4-chlorophenyl acetate was used as an acyl donor for the conversion of ketones.