The silver‐catalyzed oxidative C(sp3)−H/P−H cross‐coupling of 1,3‐dicarbonyl compounds with H‐phosphonates, followed by a chemo‐ and regioselective C(sp3)−C(CO) bond‐cleavage step, provided heavily functionalized β‐ketophosphonates. This novel method based on a readily available reaction system exhibits wide scope, high functional‐group tolerance, and exclusive selectivity.
A C(sp3)−H phosphorylation has been achieved via the iron‐catalyzedcross‐couplingreactions between 1,3‐dicarbonyl compounds and P(O)−H compounds involving C−C bond cleavages with air as the oxidant. This transformation provides a straightforward way to construct C(sp3)−P bonds, leading to the formation of β‐ketophosphine oxides in up to 93% yield with good functional group tolerance.
A concise and efficient method for the synthesis of alkynyl/benzoyl-functionalized quinolines through TfOH-promoted cascade 1,4-conjugate addition/intramolecular annulation/aromatization process is established.
Design, Synthesis, Herbicidal Activity, and Structure–Activity Relationship Study of Novel 6-(5-Aryl-Substituted-1-Pyrazolyl)-2-Picolinic Acid as Potential Herbicides
作者:Tong Feng、Qing Liu、Zhi-Yuan Xu、Hui-Ting Li、Wei Wei、Rong-Chuan Shi、Li Zhang、Yi-Ming Cao、Shang-Zhong Liu
DOI:10.3390/molecules28031431
日期:——
were designed and synthesized for the discovery of compounds with potent herbicidal activity. The compounds were tested for inhibitory activityagainst the growth of Arabidopsis thaliana roots, and the results demonstrated that the IC50 value of compound V-7 was 45 times lower than that of the halauxifen-methyl commercial herbicide. Molecular docking analyses revealed that compound V-7 docked with the
Stabilisatorgemische, Verfahren zum Stabilisieren von Kunststoffen gegen Licht mit diesen Gemischen und so stabilisierte Kunststoffe
申请人:CIBA-GEIGY AG
公开号:EP0001840A2
公开(公告)日:1979-05-16
Gemische von einem Polymeren, das in beliebiger Form chemisch gebundene Polyalkylpiperidine enthält und einer Metallverbindung MeLw, worin Me ein 2- oder 3-wertiges Metallion oder ein 2-wertiges Oxometallion oder ein 2- wertiges Dialkylzinn- ion ist, L das einwertige Anion einer Carbonsäure, einer Phosphinsäure, eines Phosphonsäure- monoesters oder eines Enols darstellt und w 2 oder 3 ist, stellen wirkungsvolle Lichtschutzmittel für Kunststoffe dar. Die Piperidin-haltigen Polymeren können zum Beispiel Polyester, Polyamide, Polyamine, Polyaminotriazine oder Poly-(meth)-acrylate sein. Beispiele für Metallverbindungen MeLw sind Nickei-oenanthat oder Nickel-acetylacetonat. Zu stabilisierende Kunststoffe sind insbesondere die Polyolefine.