Zn(ClO 4 ) 2 .6H 2 O proved to be a very powerfulcatalyst for the condensation of primary and secondary amines with β-ketoesters to give N-substituted β-enaminoesters.
Plant growth promoting and fungicidal 4-quinolinones from Pseudomonas cepacia
作者:Surk-Sik Moon、Pyeng Mo Kang、Kyung Seok Park、Choong Hoe Kim
DOI:10.1016/0031-9422(95)00897-7
日期:1996.5
4-quinolinone metabolites were isolated fromPseudomonascepacia PC II, along with the known 2-(2-heptenyl)-3-methyl-4-quinolinone (HMQ) and 3-methyl-2-(2-nonenyl)-4-quinolinone, and their structures were established as 3-methyl-2-pentyl-4-quinolinone, 2-heptyl-3-methyl-4-quinolinone and 3-methyl-2-nonyl-4-quinolinone. HMQ showed antifungal and red pepper growthpromoting activities.
从洋葱假单胞菌 PC II 中分离出三种新的 4-喹啉酮代谢物,以及已知的 2-(2-heptenyl)-3-methyl-4-quinolinone (HMQ) 和 3-methyl-2-(2-nonenyl)-4 -喹啉酮,它们的结构被确定为 3-甲基-2-戊基-4-喹啉酮、2-庚基-3-甲基-4-喹啉酮和 3-甲基-2-壬基-4-喹啉酮。HMQ 显示出抗真菌和红辣椒生长促进活性。
Rhenium‐Catalyzed Synthesis of Stereodefined Cyclopentenes from β‐Ketoesters and Aliphatic Allenes
Reactivity of Organocadmium Reagents toward Halides Other than Acid Chlorides. Improvement of Conditions for the Reformatsky Reaction<sup>*,1</sup>
作者:JAMES CASON、RALPH J. FESSENDEN
DOI:10.1021/jo01362a009
日期:1957.11
Strong Antibiotic Activity of the Myxocoumarin Scaffold
<i>in vitro</i>
and
<i>in vivo</i>
作者:Gesa Hertrampf、Kalina Kusserow、Sandra Vojnovic、Aleksandar Pavic、Jonas I. Müller、Jasmina Nikodinovic‐Runic、Tobias A. M. Gulder
DOI:10.1002/chem.202200394
日期:2022.6.7
human health. The discovery of new compounds with potent antibiotic activity is thus of utmost importance. Within this work, we identify strong antibiotic activity of the naturalproduct myxocoumarin B from Stigmatella aurantiaca MYX-030 against a range of clinically relevant bacterial pathogens, including clinical isolates of MRSA. A focused library of structural analogs was synthesized to explore initial
对现有抗生素的耐药性不断出现,对人类健康构成重大威胁。因此,发现具有有效抗生素活性的新化合物至关重要。在这项工作中,我们鉴定了来自 Stigmatella aurantiaca MYX-030 的天然产物粘香豆素 B 对一系列临床相关细菌病原体(包括 MRSA 的临床分离株)的强大抗生素活性。合成了一个重点结构类似物库,以探索初始结构-活性关系,并鉴定不含天然硝基取代基的等效粘香豆素衍生物,以显着简化合成途径。使用斑马鱼模型系统确定了粘香豆素的细胞毒性及其治疗体内细菌感染的潜力。我们的结果揭示了粘香豆素支架的特殊抗生素活性及其开发新型抗生素的潜力。