Identification and SAR of Glycine Benzamides as Potent Agonists for the GPR139 Receptor
摘要:
A focused high throughput screening for GPR139 was completed for a select 100K compounds, and new agonist leads were identified. Subsequent analysis and structure-activity relationship studies identified (S)-3-chloro-N-(2-oxo-2-((1-phenylethyl)amino)ethyl)benzamide 7c as a potent and selective agonist of hGPR139 with an EC50 = 16 nM. The compound was found to cross the blood-brain barrier and have good drug-like properties amenable for oral dosing in rat.
Enantioswitchable Catalysts for the Asymmetric Transfer Hydrogenation of Aryl Alkyl Ketones
作者:Alexey B. Zaitsev、Hans Adolfsson
DOI:10.1021/ol062227q
日期:2006.10.1
ruthenium-catalyzed reduction of ketones under hydrogentransfer conditions. In addition, in most cases, a switch of the product's absolute configuration was observed on going from amides to the corresponding thioamides. Under optimized conditions, we obtained the secondary alcohol products in high yield and enantioselectivity (up to 97% ee) using only 0.25 mol % catalyst loading. [structure: see text]
Highly modular dipeptide-like organocatalysts for direct asymmetric aldol reactions in brine
作者:Xiao-Mu Hu、Dong-Xu Zhang、Sheng-Yong Zhang、Ping-An Wang
DOI:10.1039/c5ra07019h
日期:——
dipeptide-like organocatalysts derived from proline, amino acids and primaryamines have been prepared for directasymmetricaldolreactions between various aromatic aldehydes and acetone to afford aldol products in good yields (up to 82%) and moderate enantioselectivities (up to 67% ee) with only 1 mol% of catalyst-loading in brine. Under the same conditions, the directasymmetricaldolreactions of aromatic
A Fluorous Capping Strategy for Fmoc-Based Automated and Manual Solid-Phase Peptide Synthesis
作者:Vittorio Montanari、Krishna Kumar
DOI:10.1002/ejoc.200500958
日期:2006.2
Just add water: Peptides synthesized by the use of standardized Fmoc protocols with commercial automated synthesizers can be purified from deletion products by simple centrifugation of aqueous solutions. The deletion products are capped with fluorous trivalent iodonium salts. At the end of the synthesis, the crude peptide is dissolved in water and centrifuged, and the deletion products precipitate
A series of proline-based dipeptide organocatalysts with two amide units (1-16) have been developed and evaluated in the direct catalytic asymmetric aldol reactions of aldehydes with cyclohexanone. These catalysts showed good solubility in organic solvents compared with their corresponding carboxyl terminal dipeptides. The robust amide bond formation allowed structural modifications and fine tuning of catalyst properties by varying the stereo and electronic effects of the terminal amide to affect the ability of hydrogen bonding formation between the catalysts and the substrates. The reactions proceeded smoothly in high yields (up to 99%), enantioselectivities (up to 98% ee) and anti-diastereoselectivities (up to 99:1) in the presence of bifunctional organocatalyst 4 under the optimal reaction conditions. (C) 2008 Elsevier Ltd, All rights reserved.