Asymmetric Hydrogenation of Ketones and Enones with Chiral Lewis Base Derived Frustrated Lewis Pairs
作者:Bochao Gao、Xiangqing Feng、Wei Meng、Haifeng Du
DOI:10.1002/anie.201914568
日期:2020.3.9
The concept of frustratedLewispairs (FLPs) has been widely applied in various research areas, and metal-free hydrogenation undoubtedly belongs to the most significant and successful ones. In the past decade, great efforts have been devoted to the synthesis of chiral boron Lewis acids. In a sharp contrast, chiral Lewisbase derived FLPs have rarely been disclosed for the asymmetric hydrogenation.
I86A/C295A mutant secondary alcohol dehydrogenase from Thermoanaerobacter ethanolicus has broadened substrate specificity for aryl ketones
作者:Christopher M. Nealon、Travis P. Welsh、Chang Sup Kim、Robert S. Phillips
DOI:10.1016/j.abb.2016.08.002
日期:2016.9
larger than fluorine. We have now expanded the small pocket of the active site of I86A SADH by mutation of Cys-295 to alanine to allow reaction of substituted acetophenones. As predicted, the double mutant I86A/C295A SADH has broadened substratespecificity for meta-substituted, but not para-substituted, acetophenones. However, the increase of the substratespecificity of I86A/C295A SADH is accompanied
A novel α-halogen-substituted thiophene compound or a pharmacologically acceptable salt thereof, which has a potent LPA receptor-antagonist activity and is useful as a medicament is provided.
ketoreductases (KREDs) is emerging but still challenging, due to the low solubility and slow mass transfer in aqueous media. As an eco-friendly tool for this issue, amphiphilic micelles are attractive. Herein, KRED-catalyzed reduction of halogenated aryl ketones in a TPGS-750-M formed aqueousmicellarsolution was conducted, achieving the corresponding chiral alcohols with moderate to excellent yields of up to
WLB-87848, a Selective σ1 Receptor Agonist, with an Unusually Positioned NH Group as Positive Ionizable Moiety and Showing Neuroprotective Activity
作者:Ute Christmann、Lourdes Garriga、Ana Virginia Llorente、José Luis Díaz、Rosalía Pascual、Magda Bordas、Albert Dordal、Mónica Porras、Sandra Yeste、Raquel F. Reinoso、José Miguel Vela、Carmen Almansa
DOI:10.1021/acs.jmedchem.4c00288
日期:2024.6.13
The synthesis and pharmacological activity of a new series of thieno[2,3-d]pyrimidin-4(3H)-one derivatives as sigma-1 receptor (σ1R) ligands are reported. A hit from a high-throughput screening program was evolved into a highly potent and selective σ1R agonist (14qR) that contains a free NH group as positive ionizable moiety, not fulfilling the usual pharmacophoric features of the σ1R. The compound
报道了作为 sigma-1 受体 (σ 1 R) 配体的一系列新的噻吩并[2,3- d ]嘧啶-4(3 H )-one 衍生物的合成和药理活性。高通量筛选程序的结果被进化成一种高效且选择性的 σ 1 R 激动剂 ( 14qR ),其中含有游离 NH 基团作为正离子化部分,不满足 σ 1 R 的常见药效特征。该化合物显示良好的理化和 ADMET 特性,在结合免疫球蛋白/σ 1 R 关联测定中显示出激动剂特征,在 β-淀粉样肽中毒的体外模型中诱导神经元活力,并对海马注射诱导的识别记忆障碍呈现积极结果口服治疗后大鼠体内的 Aβ 肽,使14qR (WLB-87848) 成为神经保护的有趣候选者。