Syntheses of enantio-enriched chiral building blocks from l-glutamic acid
摘要:
Starting from lactone-amide 8, easily derived from L-glutamic acid, enantioselective syntheses of (S)-tetrahydrofuran 2-carboxamide derivative 2 and a protected (S)-3-hydroxypiperidin-2-one (3) are reported. The building block 3 was converted to (2S,3R)-3-hydroxypipecolamide (6) by a three-step procedure. A solvent altered H-bonding capacity leading to a highly chemoselective tosylation of the primary hydroxyl group in the presence of an alpha-hydroxy-carboxamide was observed. (c) 2006 Elsevier Ltd. All rights reserved.
[EN] MDM2 DEGRADERS AND USES THEREOF<br/>[FR] AGENTS DE DÉGRADATION DE MDM2 ET LEURS UTILISATIONS
申请人:KYMERA THERAPEUTICS INC
公开号:WO2021188948A1
公开(公告)日:2021-09-23
The present invention relates to compounds and methods useful for the modulation of mouse double minute 2 homolog ("MDM2") protein via ubiquitination and/or degradation by compounds according to the present invention.
A General Approach to (5<i>S</i>,6<i>R</i>)-6-Alkyl-5-benzyloxy-2-piperidinones: Application to the Asymmetric Syntheses of Neurokinin Substance P Receptor Antagonist (−)-L-733,061 and (−)-Deoxocassine
A generalapproach to (5S,6R)-6-alkyl-5-benzyloxy-2-piperidinones based on the regio- and diastereoselective reductive alkylation of (S)-3-benzyloxyglutarimide 7 is described. This method opens an entrance to chiral nonracemic substituted 3-piperidinols. The versatility of the method is illustrated by the asymmetric syntheses of neurokinin substance P receptor antagonist L-733,061 (ent-1), (−)-deoxocassine
The asymmetric syntheses of (-)-epi-pseudoconhydrine and (-)-5-hydroxysedamine are reported. The key to these syntheses is an unusual highly cis-diastereoselective 1,4-asymmetric induction in the alpha-amidoallylation of the new chiral building block 15. (C) 2008 Elsevier Ltd. All rights reserved.