Mechanistic and Synthetic Investigations on the Dual Selenium-π-Acid/Photoredox Catalysis in the Context of the Aerobic Dehydrogenative Lactonization of Alkenoic Acids
作者:Stefan Ortgies、Rene Rieger、Katharina Rode、Konrad Koszinowski、Jonas Kind、Christina M. Thiele、Julia Rehbein、Alexander Breder
DOI:10.1021/acscatal.7b02729
日期:2017.11.3
efficiency and practicality, good functional group tolerance, and high sustainability, since ambient air and visible light are adequate for the clean conversion of alkenoicacids into their respective lactones. The title method has been used as a case study to elucidate the general mechanistic aspects of the dual selenium-π-acid/photoredox catalysis. On the basis of NMR spectroscopic, mass spectrometric, and
Novel asymmetric intramolecular Michael addition by chiral amide anion to α,β-unsaturated ester was performed for the asymmetric synthesis of (S)-2-oxo-5-pyrrolidineacetic acid. The acid was related to (S)-(−)-ecgoninic acid in order to determine its absolute configuration. Much higher diastereoselectivity of the chiral amide than that of the chiral ester was also demonstrated.
ALTERNATIVE PATHWAYS TO ADIPIC ACID BY COMBINED FERMENTATION AND CATALYTIC METHODS
申请人:BioAmber Inc.
公开号:US20150225329A1
公开(公告)日:2015-08-13
Processes process for producing adipate or adipic acid using biological pathways and chemical catalyzes are disclosed. Homocitric acid may be a substrate in reaction pathways leading to adipic acid or a salt thereof.
Bis-benzoxaboroles: Design, Synthesis, and Biological Evaluation as Carbonic Anhydrase Inhibitors
作者:Adèle Larcher、Alessio Nocentini、Claudiu T. Supuran、Jean-Yves Winum、Arie van der Lee、Jean-Jacques Vasseur、Danielle Laurencin、Michael Smietana
DOI:10.1021/acsmedchemlett.9b00252
日期:2019.8.8
and single crystals were obtained for two of them. These compounds were then evaluated as carbonicanhydraseinhibitors against the cytosolic hCA I and II and the transmembrane hCA IV, IX, and XII isoforms. While the benzoxaborole scaffold has been recently introduced as a new chemotype for carbonicanhydrase inhibition, these new multivalent derivatives exhibited superior inhibitory activity against
据报道一系列结合了两个或三个苯并氧杂硼杂环戊烷部分的化合物的合成,表征和生物学评估。三种不同的合成策略被用来探索这个系列中尽可能多的化学空间,所有这些策略都是从6-氨基苯并xaborole试剂开始的:酰胺偶联,亚胺键形成和方酸偶联。分离出11种纯净形式的新化合物,并为其中两个获得了单晶。然后将这些化合物评估为针对细胞质hCA I和II和跨膜hCA IV,IX和XII同工型的碳酸酐酶抑制剂。虽然最近引入了苯并氧杂硼骨架支架作为抑制碳酸酐酶的新化学型,这些新的多价衍生物对肿瘤相关的同工型hCA IX表现出优异的抑制活性。特别是,与一价6-氨基苯并恶唑硼酸酯(发现K I = 813 nM)和6-羧基苯并xaborole(K I = 400 nM),以谷氨酸结构核心和两个苯并xaborole部分为特征的衍生物2h被发现对人hCA的效力更高(K I = 64 nM),选择性更高。二。
Mechanistic Studies on the Anodic Functionalization of Alkenes Catalyzed by Diselenides
Herein, we present a detailed kinetic and thermodynamic analysis of the anodic allylic esterification of alkenes as well as the bulk application of the anodic amination and esterification of nonactivated alkenes catalyzed by diselenides. The electrochemical study led to a comprehensive picture of the coupled electrochemical and chemical reaction steps. Cyclic voltammetry measurements are consistent