medicinal agents and bioactive alkaloids. Herein we report a broadly applicable synthesis of enantioenriched NH lactams through a one-pot asymmetric reductive amination/cyclization sequence of easily available keto acids/esters. Such cascade processes alleviate the demand for protecting group manipulations as well as intermediate purification. This strategy is capable of constructing enantioenriched lactams
[EN] HIV INTEGRASE INHIBITORS<br/>[FR] INHIBITEURS D'INTEGRASE VIH
申请人:TIBOTEC PHARM LTD
公开号:WO2004096807A3
公开(公告)日:2005-01-06
Stereoselective synthesis of 3-substituted phtalides via asymmetric transfer hydrogenation using well-defined ruthenium catalysts under neutral conditions
The asymmetric transfer hydrogenation of methyl 2-acylbenzoates and 2-propyl 3-acetylpyridine- 2-carboxylate in 2-propanol, in the absence of base, with presynthesized Ru-beta -amino alcohol) or Ru-TsDPEN) true catalysts provides 3-alkylphtalides in high yields and 92-97% ee. The procedure is, however, not as efficient for the preparation of optically active 3-phenylphtalide. (C) 2001 Elsevier Science Ltd. All rights reserved.
Two non-racemic preparations of a piperidine-based NMDA antagonist with analgesic activity
作者:Britt-Marie Swahn、Karin M. Edvinsson、Elisabet Kallin、Ulf Larsson、Odd-Geir Berge、Håkan Molin、Benjamin Pelcman、Alf Claesson
DOI:10.1016/s0968-0896(97)00057-6
日期:1997.7
peridinecarboxyl ic acid 1 has been synthesized by two different methods. The NMDA receptor binding affinities (Ki values) are 74 nM for compound 1, and 64 nM for the corresponding ketone 2. The analgesic effects were evaluated using the mouse hot-plate test and the mouse formalin model. The ED50 values for the racemates of compounds 1 and 2, using the mouse hotplate and intrathecal injection, were