Synthesis, Fungicidal Activity and Mode of Action of 4-Phenyl-6-trifluoromethyl-2-aminopyrimidines against Botrytis cinerea
作者:Chunhui Liu、Zining Cui、Xiaojing Yan、Zhiqiu Qi、Mingshan Ji、Xinghai Li
DOI:10.3390/molecules21070828
日期:——
Anilinopyrimidines are the main chemical agents for management of Botrytis cinerea. However, the drug resistance in fungi against this kind of compounds is very serious. To explore new potential fungicides against B. cinerea, a series of 4-phenyl-6-trifluoromethyl-2-amino-pyrimidine compounds (compounds III-1 to III-22) were synthesized, and their structures were confirmed by 1H-NMR, IR and MS. Most of these compounds possessed excellent fungicidal activity. The compounds III-3 and III-13 showed higher fungicidal activity than the positive control pyrimethanil on fructose gelatin agar (FGA), and compound III-3 on potato dextrose agar (PDA) indicated high activity compared to the positive control cyprodinil. In vivo greenhouse results indicated that the activity of compounds III-3, III-8, and III-11 was significantly higher than that of the fungicide pyrimethanil. Scanning electron micrography (SEM) and transmission electron micrography (TEM) were applied to illustrate the mechanism of title compounds against B. cinerea. The title compounds, especially those containing a fluorine atom at the ortho-position on the benzene ring, could maintain the antifungal activity against B. cinerea, but their mechanism of action is different from that of cyprodinil. The present study lays a good foundation for us to find more efficient reagents against B. cinerea.
CO2 and water are the only byproducts of this process, and the reaction conditions can scale up to gram quantities. The transformation involves an unprecedented tBuOK-catalyzed domino process, and features Michael addition/6π-electrocyclic ring opening/[1,5]-H shift/carba-6π-electrocyclic ring closure/decarboxylative aromatization reactions.
[EN] PYRAZOLO AND IMIDAZO-PYRIMIDINE DERIVATIVES<br/>[FR] DERIVES DE PYRAZOLO-PYRIMIDINE ET D'IMIDAZO-PYRIMIDINE
申请人:HOFFMANN LA ROCHE
公开号:WO2005040171A1
公开(公告)日:2005-05-06
The present invention relates to novel pyrazolo- and imidazo-pyrimidine derivatives of formula (I) wherein A, D, E, L, M, Q, R1, R2 and R3 are as defined in the description and claims and to processes for their preparation, pharmaceutical compositions containing said derivatives and their use in the prevention and treatment of diseases.
An SAR study of hydroxy-trifluoromethylpyrazolines as inhibitors of Orai1-mediated store operated Ca2+ entry in MDA-MB-231 breast cancer cells using a convenient Fluorescence Imaging Plate Reader assay
作者:Ralph J. Stevenson、Iman Azimi、Jack U. Flanagan、Marco Inserra、Irina Vetter、Gregory R. Monteith、William A. Denny
DOI:10.1016/j.bmc.2018.05.012
日期:2018.7
structures as 5-hydroxy-5-trifluoromethylpyrazolines, a series of analogues was prepared via thermal condensation reactions between substituted acylhydrazones and trifluoromethyl 1,3-dicarbonyl arenes. Structure-activity relationship (SAR) studies showed that small lipophilic substituents at the 2- and 3-positions of the RHS and 2-, 3- and 4-postions of the LHS terminal benzene rings improved activity