[EN] CARBAMATE DERIVATIVES OF LACTAM BASED N-ACYLETHANOLAMINE ACID AMIDASE (NAAA) INHIBITORS [FR] DÉRIVÉS DE CARBAMATE D'INHIBITEURS D'AMIDASE ACIDE DE N-ACYLÉTHANOLAMINE (NAAA) À BASE DE LACTAME
Carboxylation of Aromatic and Aliphatic Bromides and Triflates with CO<sub>2</sub>
by Dual Visible-Light-Nickel Catalysis
作者:Qing-Yuan Meng、Shun Wang、Burkhard König
DOI:10.1002/anie.201706724
日期:2017.10.16
We report the efficient carboxylation of bromides and triflates with K2CO3 as the source of CO2 in the presence of an organic photocatalyst in combination with a nickel complex under visible light irradiation at room temperature. The reaction is compatible with a variety of functional groups and has been successfully applied to the synthesis and derivatization of biologically active molecules. In particular
我们报告了在室温下可见光照射下,在有机光催化剂与镍配合物的存在下,使用K 2 CO 3作为CO 2的源,溴化物和三氟甲磺酸酯的有效羧化反应。该反应与多种官能团相容,并已成功地应用于生物活性分子的合成和衍生化。特别地,未活化的环状烷基溴化物的羧化反应按照我们的方案进行得很好,从而扩展了这种转化的范围。光谱和光谱电化学研究表明Ni 0物种作为催化反应性中间体的产生。
Improving the metabolic stability of antifungal compounds based on a scaffold hopping strategy: Design, synthesis, and structure-activity relationship studies of dihydrooxazole derivatives
l-amino alcohol derivatives exhibited high antifungal activity, but the metabolic stability of human liver microsomes in vitro was poor, and the half-life of optimal compound 5 was less than 5 min. To improve the metabolic properties of the compounds, the scaffold hopping strategy was adopted and a series of antifungal compounds with a dihydrooxazole scaffold was designed and synthesized. Compounds
To discover broad spectrum antifungal agents, two strategies were applied, and a novel class of l-amino alcohol derivatives were designed and synthesized. 3-F substituted compounds 14i, 14n, 14s and 14v exhibited excellent antifungal activities with broad antifungal spectra against C. albicans and C. tropicalis, with MIC values in the range of 0.03–0.06 μg/mL, and against A. fumigatus and C. neoformans
excellent antifungalactivities against five pathogenic strains with MIC values in the range of 0.03-1 μg/mL. Compounds with R1 = 3-F substituted and 15o and 15ae exhibited moderate antifungalactivities against fluconazole-resistant strains 17# and CaR with MIC values in the range of 1-8 μg/mL. Compounds with R1 = H or 2-F (such as 15a, 15o, 15p) displayed moderate to good antifungalactivity against
A Linker for the Solid-Phase Synthesis of Hydroxamic Acids and Identification of HDAC6 Inhibitors
作者:Claus G. Bang、Jakob F. Jensen、Emil O’Hanlon Cohrt、Lasse B. Olsen、Saba G. Siyum、Kim T. Mortensen、Tine Skovgaard、Jens Berthelsen、Liang Yang、Michael Givskov、Katrine Qvortrup、Thomas E. Nielsen
DOI:10.1021/acscombsci.7b00068
日期:2017.10.9
readily available and nonintegral hydroxylamine linkers for the routine solid-phasesynthesis of hydroxamic acids. The developed protocols enable the efficient synthesis and release of a wide range of hydroxamic acids from various resins, relying on high control and flexibility with respect to reagents and synthetic processes. A trityl-based hydroxylamine linker was used to synthesize a library of peptide