26378-53-0Relevant articles and documents
Design, synthesis, crystal structure, and herbicidal activity of novel pyrrolidine-2,4-dione derivatives incorporating an alkyl ether pharmacophore with natural tetramic acids as lead compounds
Chen, Min,Geng, Chun-Wen,Han, Ling,Liu, Yu,Yu, Yong-Kai,Lu, Ai-Min,Yang, Chun-Long,Li, Guo-Hua
, p. 5621 - 5630 (2021/04/06)
In order to discover green herbicides with novel molecular scaffolds, natural tetramic acids were used as lead compounds to design and synthesize four pyrrolidine-2,4-dione derivatives incorporating a chainlike alkoxyalkyl moiety (4a-4d) and nineteen pyrrolidine-2,4-dione derivatives incorporating a substituted phenoxyethyl moiety (10a-10s)viasubstitution, acylation, cyclization, and acidification reactions. The synthesized target compounds were confirmed by FT-IR,1H NMR,13C NMR and HRMS spectral analyses. The single-crystal structure of compound10awas analyzed by X-ray diffraction, which revealed that the 1-hydroxyethylidene group links the third position of the pyrrolidine heterocycle through a double bond with theZ-configuration. The herbicidal activity was evaluated using barnyard grass (Echinochloa crus-galli) and rape (Brassica campestris) as model plants by a Petri dish culture method. Most target compounds were found to possess moderate to good inhibitory activities against the plant growth at 100 μg mL?1. Among them, the compounds10qand10nshowed the highest herbicidal activities against the roots of barnyard grass and rape seedlings with the corresponding inhibition rates of 65.6% and 84.0%, respectively. This result indicated that pyrrolidine-2,4-dione derivatives incorporating a substituted phenoxyethyl moiety are worthy of further structural optimization.
Novel synthetic strategy of N-arylated heterocycles via sequential palladium-catalyzed intra- and inter-arylamination reactions
Omar-Amrani, Rafik,Schneider, Raphael,Fort, Yves
, p. 2527 - 2534 (2007/10/03)
The use of an in situ generated Pd(0) catalyst associated to N,N′-bis(2,6-diisopropylphenyl)dihydroimidazol-2-ylidene (SIPr) as a ligand and t-BuONa as the base for sequential intra- followed by intermolecular aryl animation is described. The method has been applied to the synthesis of N-arylated five-, six- and seven-membered nitrogen heterocycles.
Phenoxypropanol connected with phenylpiperazine and phenoxyalkylamine terminal in its side chain
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, (2008/06/13)
The invention disclosed some 1,4-dihydropiridine derivative chemically have pharmacologically with adrenoceptor blocking and calcium channel blocker is now emerging. The compound of 1,4-dihydropiridine derivative wherein has the formula I, wherein R selected from four group as follow whetherin R present R1 selected from halogen(X), hydrogen(H), saturated C1-C6 alkyl chain, saturated C1-C6 alkyoxyl chain, R2 selected from R3 selected from halogen(X), hydrogen(H), saturated C1-C6 alkyl chain, saturated C1-C6 alkyoxyl chain, and O—(C1-C3)—CF3.