[EN] SUBSTITUTED GLYCINE DERIVATIVES FOR USE AS MEDICAMENTS<br/>[FR] DERIVES DE GLYCINE SUBSTITUES SERVANT DE MEDICAMENTS
申请人:PFIZER LTD
公开号:WO2004016583A1
公开(公告)日:2004-02-26
The compounds of formula (I) are substituted glycine derivatives useful in the treatment of epilepsy, faintness attacks, hypokinesia, cranial disorders, neurodegenerative disorders, depression, anxiety, panic, pain, arthritis, neuropathological disorders, sleep disorders, visceral pain disorders and gastrointestinal disorders. Processes for the preparation of the final products and intermediates useful in the process are included. Pharmaceutical compositions containing one or more of the compounds are also included. Formula (I) wherein R' is hydroxycarbonyl, a carboxylic acid biostere or prodrug thereof; R3, R3a, R2 and R2a are independently selected from H, C1-C6 alkyl, and Cl-C6 alkoxy Cl-C6 alkyl.
Enantioselective Iridium-Catalyzed
Allylic Aminations of Allylic Carbonates with Functionalized Side
Chains. Asymmetric Total Synthesis of (<i>S</i>)-Vigabatrin
Iridium-catalyzedaminations of allylic carbonates containing a variety of O-functional groups have been explored. High degrees of regio- as well as enantioselectivity were achieved with diacylamides under salt-free conditions and with arylamines. The results allowed the antiepilepsy drug (S)-vigabatrin to be prepared via a very short route.
Enantioselective Syntheses of 2,5-Disubstituted Pyrrolidines Based on Iridium-Catalyzed Allylic Aminations-Total Syntheses of Alkaloids from Amphibian Skins
作者:Martin Gärtner、Robert Weihofen、Günter Helmchen
DOI:10.1002/chem.201100649
日期:2011.6.27
A broadly applicable route to trans‐2,5‐disubstituted pyrrolidines has been developed. Key steps are an asymmetric iridium‐catalyzed allylic amination, a Suzuki–Miyaura coupling, and an intramolecular aza‐Michael addition. Enantiomeric excesses in the range of 93–99 % ee have been achieved. Total syntheses of the alkaloids (−)‐225 C, (+)‐ and (−)‐223 H (xenovenine), (+)‐223 AB, (+)‐195 B, and (+)‐223 R
Ir-Catalyzed Asymmetric Allylic Substitutions with (Phosphoramidite)Ir Complexes-Resting States, Synthesis, and Characterization of Catalytically Active (π-Allyl)Ir Complexes
作者:Stephanie Spiess、Jevgenij A. Raskatov、Christian Gnamm、Kerstin Brödner、Günter Helmchen
DOI:10.1002/chem.200902065
日期:2009.10.26
(π‐Allyl)Ircomplexes: A new and very simple one‐pot synthesis of (π‐allyl)Ircomplexes derived from phosphoramidites L is presented (see scheme). Ready availability of the allyl complexes allowed resting states and other parameters of the Ir‐catalyzed allylicsubstitution to be determined.
Ir-Catalysed Asymmetric Allylic Substitutions with Cyclometalated (Phosphoramidite)Ir Complexes-Resting States, Catalytically Active (π-Allyl)Ir Complexes and Computational Exploration
作者:Jevgenij A. Raskatov、Stephanie Spiess、Christian Gnamm、Kerstin Brödner、Frank Rominger、Günter Helmchen
DOI:10.1002/chem.200903465
日期:2010.6.11
Mechanistic aspects of allylicsubstitutions with iridium catalysts derived from phosphoramidites by cyclometalation were investigated. The determination of resting states by 31P NMR spectroscopy led to the conclusion that the cyclometalation process is reversible. A novel, one‐pot procedure for the preparation of (π‐ allyl)Ircomplexes was developed, and these complexes were characterised by X‐ray
研究了通过环金属化衍生自亚磷酰胺的铱催化剂进行烯丙基取代的机理。通过31 P NMR光谱法测定静止态得出的结论是环金属化过程是可逆的。开发了一种新颖的一锅法制备(π-烯丙基)Ir配合物,并通过X射线晶体结构分析和光谱数据对这些配合物进行了表征。它们是烯丙基取代反应的全活性催化剂。对烯丙基配合物,烯丙基取代基的过渡态和产物烯烃配合物的DFT计算提供了进一步的机理见解。