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93-59-4Relevant academic research and scientific papers
The interaction of α-cyclodextrin with aliphatic, aromatic and inorganic peracids, the corresponding parent acids and their respective anions
Davies, D. Martin,Deary, Michael E.
, p. 2415 - 2421 (1996)
Potentiometric or combined potentiometric and spectrophotometric or kinetic techniques have been used to determine stability constants for complexes between α-cyclodextrin and 20 of the title compounds. Linear free energy relationships indicate that 4-substituted benzoic acids, perbenzoic acids and perbenzoates have predominantly the same orientation within the cyclodextrin cavity, with the carboxylic acid, percarboxylic acid and percarboxylate groups located at the narrow (primary hydroxy) end of the cavity. 4-Substituted benzoates orientate in the opposite way with the carboxylate group located at the wide end of the cavity. Alkyl carboxylic acids, percarboxylic acids and their anions show a linear dependence between log stability constant and the number of carbons. They are likely to bind with the functional group at the narrow end of the cavity, although the carboxylate groups will probably be located outside the cavity because of solvation requirements. 2:1 cyclodextrin-guest complexes are observed for several of the compounds studied.
Aerobic oxidation of aldehydes to acids with N-hydroxyphthalimide derivatives
Takamatsu, Keigo,Kasai, Miku,Nishizawa, Hinaru,Suzuki, Rio,Konno, Hiroyuki
, (2021/09/14)
The N-hydroxyphthalimide derivative-mediated aerobic oxidation of a selection of aldehydes to the corresponding carboxylic acids in air is described. This reaction proceeds via rearrangement of the Creigee (carboxylic peracid) intermediate and/or by the treatment of H2O and/or sulfides. Optimization of reaction conditions established NHNPI (14) as a mild catalyst for the oxidation reaction in MeCN under an atmosphere of air.
Solvation Accounts for the Counterintuitive Nucleophilicity Ordering of Peroxide Anions
Mayer, Robert J.,Tokuyasu, Takahiro,Mayer, Peter,Gomar, Jér?me,Sabelle, Stéphane,Mennucci, Benedetta,Mayr, Herbert,Ofial, Armin R.
supporting information, p. 13279 - 13282 (2017/10/17)
The nucleophilic reactivities (N, sN) of peroxide anions (generated from aromatic and aliphatic peroxy acids or alkyl hydroperoxides) were investigated by following the kinetics of their reactions with a series of benzhydrylium ions (Ar2CH+) in alkaline aqueous solutions at 20 °C. The second-order rate constants revealed that deprotonated peroxy acids (RCO3?), although they are the considerably weaker Br?nsted bases, react much faster than anions of aliphatic hydroperoxides (ROO?). Substitution of the rate constants of their reactions with benzhydrylium ions into the linear free energy relationship lg k=sN(N+E) furnished nucleophilicity parameters (N, sN) of peroxide anions, which were successfully applied to predict the rates of Weitz–Scheffer epoxidations. DFT calculations with inclusion of solvent effects by means of the Integral Equation Formalism version of the Polarizable Continuum Model were performed to rationalize the observed reactivities.
Chemical transformations and biological studies of terpenoids isolated from essential oil of Cyperus scariosus
Sharma,Utreja,Bedi
, p. 2153 - 2158 (2016/07/20)
Cyperus scariosus is a potential medicinal herb belonging to the family Cyperaceae. The GC-MS analysis of the oil showed cyprene (18.57 %) as the major terpene present in it. Cyprene was isolated from the non-polar fraction of the oil using hexane as solvent and characterized using TLC and spectral techniques (IR and 1H NMR). Cyprene was derivatized to cyprene epoxide by two methods i.e. using perbenzoic acid and epichlorohydrin. Further, the oil, it's polar fraction (dichloromethane), non-polar fraction (hexane), cyprene and cyprene epoxide were screened for their plant growth regulating property in case of wheat seedlings (HD 2967 and PBW 621). Complete germination was observed above 2.5 μg/mL of all the test fractions in both the cultivars. Moreover, cyprene epoxide was found to be the most effective in enhancing the length of roots and shoots. Seedling vigour index was calculated in order to analyze the enhancement shown by the oil and its various components on the seedlings.
One-pot epoxidation of alkenes using aerobic photoperoxidation of toluenes
Taguchi, Miyabi,Nagasawa, Yoshitomo,Yamaguchi, Eiji,Tada, Norihiro,Miura, Tsuyoshi,Itoh, Akichika
supporting information, p. 230 - 232 (2015/12/31)
We developed an aerobic photooxidative synthesis of peroxybenzoic acids from toluenes using anthraquinone-2-carboxylic acid (AQN-2-CO2H) as a photocatalyst. We also found a one-pot epoxidation reaction of alkenes using 4-tert-butylperoxybenzoic acid produced in situ by aerobic photooxidative synthesis.
DIBENZOYL PEROXIDE DERIVATIVES, PREPARATION METHOD THEREOF AND COSMETIC OR DERMATOLOGICAL COMPOSITIONS CONTAINING SAME
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Paragraph 0157, (2013/04/10)
The use of compounds in the treatment of skin disorders is described. In particular, compounds having the general formula (I): are described. A process for preparing such compounds and their cosmetic or dermatological use are also described. The described compounds can act as bactericides. As a result, they can be useful in the treatment of conditions associated with the presence of bacteria, more specifically of P. acnes.
Facile aerobic photooxidation of alcohols using 2-chloroanthraquinone under visible light irradiation
Shimada, Yoshiko,Hattori, Kasumi,Tada, Norihiro,Miura, Tsuyoshi,Itoh, Akichika
, p. 2684 - 2688 (2013/10/21)
A facile photooxidation of alcohols to obtain carboxylic acids and ketones using easily handled 2-chloroanthraquinone as an organocatalyst under visible light irradiation in an air atmosphere is reported. The reaction conditions are mild, such as an air atmosphere and ambient pressure and temperature. Georg Thieme Verlag Stuttgart New York.
NOVEL PEROXIDE DERIVATIVES, THEIR PROCESS OF PREPARATION AND THEIR USE IN HUMAN MEDICINE AND IN COSMETICS FOR THE TREATMENT OR PREVENTION OF ACNE
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Page/Page column 24, (2011/06/26)
The present invention relates to the use of the compounds of following general formula (I): It also relates to their process of preparation and to their therapeutic application.
Catalytic oxidative cleavage of 1,3-diketones to carboxylic acids by aerobic photooxidation with iodine
Tada, Norihiro,Shomura, Motoki,Cui, Lei,Nobuta, Tomoya,Miura, Tsuyoshi,Itoh, Akichika
scheme or table, p. 2896 - 2900 (2012/01/03)
We report the catalytic oxidative cleavage of 1,3-diketones to the corresponding carboxylic acids by aerobic photooxidation with iodine under irradiation with a high-pressure mercury lamp. Georg Thieme Verlag Stuttgart. New York.
Study of a benzoylperoxy radical in the gas phase: Ultraviolet spectrum and C6H5C(O)O2 + HO2 reaction between 295 and 357 K
Roth,Chakir,Ferhati
experimental part, p. 10367 - 10379 (2011/02/18)
This work reports the ultraviolet absorption spectrum and the kinetic determinations of the reactions 2C6H5C(O)O2 → products (I) and C6H5C(O)O2 + HO 2 → C6H5C(O)O2H + O2 (IIa), → C6H5C(O)OH + O3 (IIb), → C6H5C(O)O + OH + O2 (IIc). Experiments were performed using a laser photolysis technique coupled with UV-visible absorption detection over the pressure range of 80-120 Torr and the temperature range of 293-357 K. The UV spectrum was determined relative to the known cross section of the ethylperoxy radical C2H5O2 at 250 nm. Kinetic data were obtained by simulating the temporal behavior of the UV absorption at 245-260 nm. At room temperature, the rate constant value of reaction I (cm3 . molecule-1 . s-1) was found to be kI ) (1.5 ± 0.6) × 10-11. The Arrhenius expression for reaction II is (cm3 . molecule-1 . s -1) kII(T) ± (1.10 ± 0.20) × 10 -11 exp(364 ± 200/T). The branching ratios βO3 and βOH, respectively, of reactions IIb and IIc are evaluated at different temperatures; βO3 increases from 0.15 ± 0.05 at room temperature to 0.40 ± 0.05 at 357 K, whereas βOH remains constant at 0.20 ± 0.05. To confirm the mechanism of reaction II, a theoretical study was performed at the B3LYP/6-311++G(2d,pd) level of theory followed by CBS-QB3 energy calculations.