7452-10-0Relevant academic research and scientific papers
Synthesis and pharmacological evaluation of childinin E and several derivatives as anti-hyphal formation inhibitors against Candida albicans
Hirata, Momoka,Kamauchi, Hitoshi,Sugita, Yoshiaki,Takao, Koichi
supporting information, (2020/11/12)
The natural highly substituted benzophenone childinin E (1) was previously isolated from the fungus Daldinia childiae. Here we describe the total synthesis of childinin E and several derivatives using a linear seven-step sequence. The antifungal propertie
USE OF BENZOXABOROLE AS FUNGICIDES
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Page/Page column 19-20, (2018/01/20)
A method for controlling or preventing infestation of plants or plant propagation material and/or harvested food crops susceptible to microbial attack by treating plants or plant propagation material and/or harvested food crops a fungicidally effective am
The effect of metal ions on the reaction of hydrogen peroxide with Kraft lignin model compounds
Sun, Yujun,Fenster, Michael,Yu, Annie,Berry, Richard M.,Argyropoulos, Dimitris S.
, p. 667 - 675 (2007/10/03)
Peroxide bleaching is significantly affected by transition and alkaline earth metals. Isolating the effects of different transition and alkaline earth metals on the reactions of peroxide with different representative lignin structures allows the separation of the positive from the negative contributions of these metal ions. In this work, five monomeric or dimeric phenolic lignin model compounds were treated with alkaline hydrogen peroxide in the absence or presence of Mn2+, Cu2+, Fe3+, and Mg2+. We followed the disappearance of the starting material and the progress of demethylation, radical coupling and oxalic acid formation were followed. Transition metals increased the reactivities of all the lignin model compounds with hydrogen peroxide in the order Mn2+ > Cu2+ > Fe3+, which is the same as the order of activity toward peroxide decomposition while Mg2+ stabilized the system. Demethylation, radical coupling, and oxalic acid formation were all increased by the presence of transition metals in the system and decreased by the addition of Mg2+. The acceleration of the total degree of reaction and of the demethoxylation reactions improves peroxide bleaching, but the increase in the radical coupling reactions can affect the further bleachability of pulp while the increase in the formation of oxalic acid could lead to a greater probability of scaling.
Chemistry of 2-Methoxy-2,5-cyclohexadienones. III. Syntheses of 2-Methoxy-4,4-diphenyl-2,5-cyclohexadienone and 4-Dichloromethyl-2-methoxy-4-methyl-2,5-cyclohexadienone
Matoba, Katsuhide,Kawagoshi, Fujiko,Yamazaki, Takao
, p. 4721 - 4725 (2007/10/02)
2-Methoxy-4,4-diphenyl-2,5-cyclohexadienone (Ib) was synthesized by phenylselenylation of 2-methoxy-4,4-diphenyl-2-cyclohexenone (Va) followed by oxidative deselenylation of the resultant 6-phenylselenyl derivative (Vc). 4-Dichloromethyl-2-methoxy-4-methy
Anodic Pyridination of 2-Hydroxy-3-methoxy-5-methylbenzaldehyde and its Schiff's Base Derivatives
Ohmori, Hidenobu,Matsumoto, Akiteru,Masui, Masaichiro
, p. 347 - 357 (2007/10/02)
Anodic oxidation of substituted phenols, 2-hydroxy-3-methoxy-5-methylbenzaldehyde (1) and its Schiff's base derivatives (2) in acetonitrile containing an excess of pyridine gave pyridinated phenols.Pyridination occured at the methyl group of the hydroxybenzaldehyde (1) and the Schiff's base (2g) derived from p-nitroaniline, while for the other Schiff's base derivatives of (1) studied the pyridinium group was on the ring meta to the hydroxy and ortho to the imino group.The pyridination process was investigated by cyclic voltammetry and controlled potential and constant current electrolysis of (1), (2), and related phenols including 2-hydroxy-3-methoxybenzaldehyde Schiff's bases (4).Two different routes are suggested for pyridination, a process involving a phenoxonium ion and one involving a quinone methide.Under the conditions of controlled potential electrolysis, ring pyridination proceeds through the phenoxonium ion route and side-chain pyridination through the quinone methide route.The role of the imino group in the anodic oxidation of the phenolic Schiff's bases (2) and (4) is discussed.The principal mode is suggested to be catalysis of the dimerisation of the corresponding cation radicals by accepting the proton of the hydroxy-group intramolecularly to remove the positive charge from the reaction centre.
