ASYMMETRIC SYNTHESES FOR SPIRO-OXINDOLE COMPOUNDS USEFUL AS THERAPEUTIC AGENTS
申请人:XENON PHARMACEUTICALS INC.
公开号:US20130274483A1
公开(公告)日:2013-10-17
This invention is directed to asymmetric syntheses of certain spiro-oxindole derivatives, which are useful for the treatment and/or prevention of sodium channel-mediated diseases or conditions, such as pain.
[EN] PROCESSES FOR PREPARING TOLL-LIKE RECEPTOR MODULATOR COMPOUNDS<br/>[FR] PROCÉDÉS DE PRÉPARATION DE COMPOSÉS MODULATEURS DU RÉCEPTEUR DE TYPE TOLL
申请人:GILEAD SCIENCES INC
公开号:WO2020264081A1
公开(公告)日:2020-12-30
The present disclosure provides methods for preparing (7?)-2-((2-amino-7- fluoropyrido[3,2-d]pyrimidin-4-yl)amino)-2-methylhexan-l-ol or a salt thereof and related key intermediates.
Stuttgart · New York ISSN 0039-7881 Abstract: The catalytic asymmetric alkylation under phase-transfer conditions of various substrates (enones, -fluoro ketones, glycineimines) promoted by chiral quaternary ammonium salts derived from cinchona alkaloids is described. A solvent-free phase-transfer catalysis is presented as well as a newtype of polymer-supported phase-transfercatalyst derived from
SUBSTITUTED PROPANAMIDE DERIVATIVE AND PHARMACEUTICAL COMPOSITION CONTAINING THE SAME
申请人:Daiichi Sankyo Company, Limited
公开号:EP1908466B1
公开(公告)日:2014-02-19
Asymmetric synthesis of N-aryl aziridines
作者:João Aires-de-Sousa、Sundaresan Prabhakar、Ana M. Lobo、Ana M. Rosa、Mário J.S. Gomes、Marta C. Corvo、David J. Williams、Andrew J.P. White
DOI:10.1016/s0957-4166(01)00548-1
日期:2002.1
The reactions of a variety of N-arylhydroxamates as nitrogen transfer reagents to acryloyl derivatives of (-)-8-phenylmenthol, (-)-quinine and (-)-Oppolzer's sultam acting as Michael acceptors was studied. Poor to modest diastereoselection was observed in the formation of aziridines. The absolute structure of one of the pure diastereomers secured from Oppolzer's auxiliary was established by X-ray crystallography and hence the absolute configuration of the derived methyl-N-phenylaziridine-2-carboxylate could be assigned. Whilst only poor facial selectivity was observed for chiral hydroxamic acid prepared from dehydroabietic acid, moderate to good enantioselection of aziridines could be achieved with the chiral quaternary salts based on cinchona alkaloids, especially with that of cinchonine. A model is presented to explain the origin of enantio selection and a mechanism is proposed for the aziridination reaction. (C) 2002 Elsevier Science Ltd. All rights reserved.