Results 341 to 350 of about 739,097 (405)

O2 -mediated dehydrogenative amination of phenols.

Angewandte Chemie, 2015
A method was developed for the direct dehydrogenative construction of CN bonds between unprotected phenols and a series of cyclic anilines without resorting to any kind of metal activation of either substrate and without the use of halides.
Marie‐Laure Louillat‐Habermeyer, Rongwei Jin, F. Patureau   +2 more
semanticscholar   +1 more source

Catalytic ethoxylation of phenol and phenol derivatives

Reaction Kinetics and Catalysis Letters, 1980
The kinetics of catalytic mono- and polyethoxylation of phenol, p-cumyl-phenol and p-isooctylphenol have been studied in the presence of strongly basic anion exchanger Wofatit SBW in hydroxy form. The influence of substituents on the rate has been investigated and the mechanism of the reaction is discussed.
S. V. Kotov, K. M. Markov, R. S. Boeva
openaire   +2 more sources

Kinetics of Ozonation of Phenol and Substituted Phenols

Industrial & Engineering Chemistry Research, 2019
In the treatment of wastewaters contaminated with phenol and substituted phenols, an intermediate chemical step of partial oxidation is often employed to facilitate the ensuing biodegradation process. Ozonation is a candidate technique for partial oxidation of phenolics.
R.N. Patil, Jyeshtharaj B. Joshi, Jyeshtharaj B. Joshi, Ghanshyam S. Bhosale, Prakash D. Vaidya   +4 more
openaire   +2 more sources

Oxidative Cross-Coupling of Two Different Phenols: An Efficient Route to Unsymmetrical Biphenols.

Organic Letters, 2015
An efficient synthesis of unsymmetrical biphenols via the oxidative cross-coupling of two different phenols in the presence of K2S2O8 and Bu4N(+)·HSO3(-) (10 mol %) in CF3COOH at ambient conditions is described.
N. Y. More, M. Jeganmohan
semanticscholar   +1 more source

BIODEGRADATION OF PHENOLS BY MICROALGAE

Biotechnology Letters, 2002
Two green microalgae, Ankistrodesmus braunii and Scenedesmus quadricauda, degraded phenols (each tested at 400 mg ml−1) selected from olive-oil mill wastewaters, within 5 days, with a removal greater than 70%. Green algae may, therefore, represent an alternative to other biological treatment used for the biodegradation of phenol-containing wastewaters.
POLLIO, ANTONINO, PINTO, GABRIELE, PREVITERA, LUCIO, TEMUSSI F.   +3 more
openaire   +7 more sources

ABTS as an Electron Shuttle to Enhance the Oxidation Kinetics of Substituted Phenols by Aqueous Permanganate.

Environmental Science and Technology, 2015
In this study, it was, interestingly, found that 2,2'-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS), a widely used electron shuttle, could greatly accelerate the oxidation of substituted phenols by potassium permanganate (Mn(VII)) in aqueous ...
Yang Song, Jin Jiang, Jun Ma, Su-yan Pang, Yongze Liu, Yi Yang, Congwei Luo, Jianqiao Zhang, Jia Gu, Wen Qin   +9 more
semanticscholar   +1 more source

The metabolism of phenol and substituted phenols in zebra fish

Xenobiotica, 1987
1. The metabolism of five phenols in zebra fish was studied after uptake from the medium. The results showed no qualitative differences to other Cyprinid fish species, only the oxidation rate seemed to be lower. 2. Phenyl glucuronide, phenyl sulphate, and quinol sulphate were identified as metabolites of phenol. 3.
T. Kasokat, Roland Nagel, Klaus Urich
openaire   +3 more sources

PHENOL–DIENONE REARRANGEMENT IN THE REACTIONS OF PHENOLS [PDF]

Russian Chemical Reviews, 1963
CONTENTS I. Introduction 75 II. Effect of structure of phenol on ease of formation of dienone compounds 75 III. Halogenation of phenol. Tribromophenol bromide 78 IV. Halogenation of alkylphenols 79 V. Reactivity of quinohalide compounds. Problem of methylenequinone 82 VI. Nitration of phenols 84 VII. Alkylation of phenols 85 VIII. Formation of dienones
A A Volod'kin, V V Ershov, G N Bogdanov
openaire   +1 more source

Highly site-selective direct C-H bond functionalization of phenols with α-aryl-α-diazoacetates and diazooxindoles via gold catalysis.

Journal of the American Chemical Society, 2014
An unprecedented direct C-H bond functionalization of unprotected phenols with α-aryl α-diazoacetates and diazooxindoles was developed. A tris(2,4-di-tert-butylphenyl) phosphite derived gold complex promoted the highly chemoselective and site-selective C-
Zhu Yu, Ben Ma, Mingjin Chen, Haihong Wu, Lu Liu, Junliang Zhang   +5 more
semanticscholar   +1 more source

Overriding ortho-para selectivity via a traceless directing group relay strategy: the meta-selective arylation of phenols.

Journal of the American Chemical Society, 2014
The direct functionalization of phenols at the ortho and para position is generally facilitated by the electron-donating nature of the hydroxyl group. Accessing meta-functionalized phenols from the parent phenols, on the other hand, generally requires ...
Junfei Luo, S. Preciado, Igor Larrosa
semanticscholar   +1 more source