Peptide-Catalyzed Conversion of Racemic Oxazol-5(4H)-ones into Enantiomerically Enriched α-Amino Acid Derivatives
摘要:
We report the development and optimization of a tetrapeptide that catalyzes the methanolytic dynamic kinetic resolution of oxazol-5(4H)-ones (azlactones) with high levels of enantioinduction. Oxazolones possessing benzylic-type substituents were found to perform better than others, providing methyl ester products in 88:12 to 98:2 er. The mechanism of this peptide-catalyzed process was investigated through truncation studies and competition experiments. High-field NOESY analysis was performed to elucidate the solution-phase structure of the peptide, and we present a plausible model for catalysis.
[EN] PYRIDIN- 2 -AMIDES USEFUL AS CB2 AGONISTS<br/>[FR] PYRIDIN-2-AMIDES UTILES COMME AGONISTES DE CB2
申请人:HOFFMANN LA ROCHE
公开号:WO2012168350A1
公开(公告)日:2012-12-13
The invention relates to a compound of formula (I) wherein R1 to R4 are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament.
[EN] NITROGEN-CONTAINING HETEROCYCLIC COMPOUND<br/>[FR] COMPOSÉ HÉTÉROCYCLIQUE CONTENANT DE L'AZOTE
申请人:TAKEDA PHARMACEUTICAL
公开号:WO2013018929A1
公开(公告)日:2013-02-07
The present invention provides a novel compound having a superior activity as an ERR-α modulator and useful as an agent for the prophylaxis or treatment of ERR-α associated diseases. The present invention relates to a compound represented by the formula (1) wherein each symbol is as defined in the specification, or a salt thereof.
Structural studies of β-turn-containing peptide catalysts for atroposelective quinazolinone bromination
作者:A. J. Metrano、N. C. Abascal、B. Q. Mercado、E. K. Paulson、S. J. Miller
DOI:10.1039/c6cc01428c
日期:——
X-Ray crystallography and NMR spectroscopy were used to investigate the effect of primary structure on both secondary structure and enantioselectivity in peptide-based catalysts for an atroposelective bromination reaction.
Enantioselective Synthesis of 3-Arylquinazolin-4(3<i>H</i>)-ones via Peptide-Catalyzed Atroposelective Bromination
作者:Matthew E. Diener、Anthony J. Metrano、Shuhei Kusano、Scott J. Miller
DOI:10.1021/jacs.5b07726
日期:2015.9.30
atroposelective bromination of pharmaceutically relevant 3-arylquinazolin-4(3H)-ones (quinazolinones) with high levels of enantioinduction over a broad substrate scope. The structure of the free catalyst and the peptide-substrate complex were explored using X-ray crystallography and 2D-NOESY experiments. Quinazolinone rotational barriers about the chiral anilide axis were also studied using density functional
The invention relates to a compound of formula (I)
wherein R
1
to R
4
are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament. In particular, the compound may be used as a preferential agonist of Cannabinoid Receptor 2.