Synthesis of 3,5,7-triketo acids and esters and their cyclizations to resorcinol and phloroglucinol derivatives. Models of biosynthesis of phenolic compounds
Convenient One-Step Synthesis of Benzo[<i>c</i>]phenanthridines by Three-Component Reactions of Isochromenylium Tetrafluoroborates and Stilbenes in Acetonitrile
作者:Gang-Gang Chen、Jun-Qiang Wei、Xiaoliang Yang、Zhu-Jun Yao
DOI:10.1021/acs.orglett.6b00010
日期:2016.4.1
A new type of three-component reaction of air-stable isochromenylium tetrafluoroborates with electron-rich stilbenes in acetonitrile has been developed under catalyst-free conditions in this work. This cascade multibond-formation reaction is initiated by an intermolecular oxa [4 + 2]-cycloaddition, relayed with a nucleophilic addition of acetonitrile, and terminated by an intramolecular Friedel–Crafts
在这项工作中,在无催化剂条件下,开发了一种新型的空气稳定的四氟硼酸异铬腈与乙腈中富含电子的对苯二甲酸酯的三组分反应。这种级联的多键形成反应由分子间的氧杂[4 + 2]-环加成反应引发,再与乙腈进行亲核加成反应,再由分子内的Friedel-Crafts反应终止,一步即可得到相应的苯并[ c ]菲啶类似物。
pH-switched HRP-catalyzed dimerization of resveratrol: a selective biomimetic synthesis
作者:Chang Li、Jing Lu、Xiaofei Xu、Ruilin Hu、Yuanjiang Pan
DOI:10.1039/c2gc36288k
日期:——
A selective, concise and green biomimetic synthesis strategy of seven resveratrol dimers from natural resveratrol monomer as starting material is described. By succinct adjustment of environmental pH, the enzyme used, horseradish peroxidase (HRP), can perform in three distinctly different patterns and five dimers form with considerable selectivity. Two other derivative dimers are subsequently synthesized.
Pinosylvin-Based Polymers: Biodegradable Poly(Anhydride-Esters) for Extended Release of Antibacterial Pinosylvin
作者:Stephan Bien-Aime、Weiling Yu、Kathryn E. Uhrich
DOI:10.1002/mabi.201500454
日期:2016.7
40 d to releasepinosylvin. Pseudo‐first order kinetic experiments on model compounds, butyric anhydride and 3‐butylstilbene ester, indicate that the anhydride linkages hydrolyze first, followed by the ester bonds to ultimately releasepinosylvin. An antibacterial assay shows that the releasedpinosylvin exhibit bioactivity, while in vitro cytocompatibility studies demonstrate that the polymer is noncytotoxic
Hydroxystilbene compounds used as microbicidal active substances
申请人:Ciba Specialty Chemicals Corporation
公开号:US06814960B1
公开(公告)日:2004-11-09
The use of hydroxystilbene compounds of formula
wherein
A is a radical of formula
or a radical of formula
and
R1, R2, R3, R4 and R5 are each independently of the others hydrogen, halogen, hydroxy, C1-C16alkyl, C1-C16alkoxy, phenyl; C1-C3phenylalkyl; C6-C10aryloxy, amino, mono-C1-C5alkylamino, di-C1-C5alkylamino, or —NO2;
as microbicidal active ingredients is described.
The compounds exhibit a pronounced action against pathogenic gram-positive and gram-negative bacteria, and also against yeasts and moulds. They are therefore suitable for the antimicrobial treatment, especially the preservation and disinfection, of surfaces.