30225-80-0Relevant academic research and scientific papers
Antimicrobial agent isolated from Coptidis rhizome extract incubated with Rhodococcus sp. strain BD7100
Ishikawa, Kazuki,Takahashi, Kazunori,Hosoi, Syun,Takeda, Hisashi,Yoshida, Hinaka,Wakana, Daigo,Tsubuki, Masayoshi,Sato, Fumihiko,Tojo, Motoaki,Hosoe, Tomoo
, p. 71 - 78 (2019)
Coptidis rhizome (CR) is a widely used herbal medicine that contains protoberberine-type alkaloids. CR extract exhibits various pharmacologic activities. A previous study reported the isolation of Rhodococcus sp. strain BD7100 as a berberine (BBR)-utilizing bacterium, and the BBR-degradation pathway has been investigated. When we incubated strain BD7100 cells with CR extract, the number of viable cells declined with the degradation of components in the CR extract, and the culture broth exhibited antibacterial activity against strain BD7100. These results suggest that CR extract cultured in the presence of strain BD7100 contains one or more antibacterial agents. In this study, we isolated coptirhoquinone A (1) from CR extract incubated with strain BD7100 in Luria–Bertani (LB) medium, and the structure was elucidated using NMR and MS analysis. We also report the total synthesis and antimicrobial activities of 1 against bacteria, fungi, and Pythium sp.
A Concise Synthesis of Pyrazole Analogues of CombretastatinA1 as Potent Anti-Tubulin Agents
Zaninetti, Roberta,Cortese, Salvatore V.,Aprile, Silvio,Massarotti, Alberto,Canonico, Pier Luigi,Sorba, Giovanni,Grosa, Giorgio,Genazzani, Armando A.,Pirali, Tracey
supporting information, p. 633 - 643 (2013/08/22)
CombretastatinA1 (CA1) binds to the β-subunit at the colchicine binding site of tubulin and inhibits polymerization. As such, it is both an antitumor agent and a vascular disrupting agent. It has been shown to be at least tenfold more potent than combreta
Steric control of site selectivity in the Pd-catalyzed C-H acetoxylation of simple arenes
Cook, Amanda K.,Emmert, Marion H.,Sanford, Melanie S.
supporting information, p. 5428 - 5431 (2013/11/19)
This report describes the use of an oxidant and a ligand to control site selectivity in the Pd(OAc)2-catalyzed C-H acetoxylation of simple arenes. The use of MesI(OAc)2 as the terminal oxidant in combination with acridine as the ligand results in primarily sterically controlled selectivity. In contrast, with Pd(OAc)2 as the catalyst and PhI(OAc)2 as the oxidant, electronic effects dominate the selectivity of arene C-H acetoxylation.
The Baeyer-Villiger Oxidation of Aromatic Aldehydes and Ketones with Hydrogen Peroxide Catalyzed by Selenium Compounds
Syper, Ludwik
, p. 167 - 172 (2007/10/02)
A series of organoselenium compounds was investigated as activators of hydrogen peroxide in the Baeyer-Villiger oxidation.As a result, a convenient and cheap method for transformation of aromatic aldehydes, having polycondensed ring systems or electron-donating substituents, and polymethoxy derivatives of acetophenone, into phenols was elaborated.This method utilizes hydrogen peroxide activated by areneseleninic acids, as oxidizing agent.
