- Kinetics of formation of peroxyformic acid
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Oxidation kinetics of formic acid with aqueous hydrogen peroxide (30-70%) has been studied at 45°C with 0-0.1 M H2SO4 as a catalyst. A kinetic model has been suggested which satisfactorily describes the oxidation process of formic acid to peroxyformic acid.
- Mosovsky, Vladimir,Cvengrosova, Zuzana,Kaszonyi, Alexander,Kralik, Milan,Hronec, Milan
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- 33. Synthesis of Concentrated 18O-Labelled Hydrogen Peroxide and of 2H-, 13C- and 18O-Labelled Peroxyformic Acid
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A method is described for the preparation of concentrated solutions (50-70percent) of 18O-labelled H2O2 in water.All singly 2H-, 13C- and 18O-labelled species of peroxyformic acid have been synthesized by the reaction of appropriately labelled formic acid and H2O2.
- Grassi, Guido,Oldani, Markus,Bauder, Alfred
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- Quantitation of glutathione and its oxidation products in erythrocytes by multiple-label stable-isotope dilution
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A multiple-label stable isotope dilution assay for quantifying glutathione (GSH), glutathione disulfide (GSSG), and glutathione sulfonic acid in erythrocytes was developed. As the internal standards, [13C 3,15N]glutathione
- Reinbold, Julia,Koehler, Peter,Rychlik, Michael
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- Unexpected reaction of melatonin derivatives with performic acid
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A series of carbamate melatonin derivatives was treated with performic acid, providing tricyclic products with a 3-hydroxytetrahydropyrrolo[2,3-b] indole skeleton. An unusual migration of carbamate groups was observed in some cases, and the reaction appea
- Mol?da, Zuzanna,Zawadzka, Anna,Zytek, Ma?gorzata,Madej, Daria,Pluciński, Franciszek,Maurin, Jan K.,Czarnocki, Zbigniew
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- Vibrational spectra and normal coordinate analysis of isotopically labelled peroxyformic acid.
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Infrared spectra of peroxyformic acid (HCOOOH) and the six isotopic modifications H13COOOH, HC18OOOH, DCOOOH, HCOOOD, H13COOOD, DCOOOD have been recorded in an argon matrix in the spectral range 200-4000 cm-1.Assignments of the observed absorpt
- Tyblewski, M.,Dommen, J.,Ha, T.-K.,Bauder, A.
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- The benzoin condensation: Charge tagging of the catalyst allows for tracking by mass spectrometry Dedicated to Professor Veronica M. Bierbaum.
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A novel thiazolium with a sulfonate charge tag was synthesized to test the feasibility of tracking the progress of a thiazolylidene-catalyzed benzoin condensation reaction using electrospray ionization-mass spectrometry (ESI-MS). Intermediates in the benz
- Zeng, Hao,Wang, Kai,Tian, Yuan,Niu, Yijie,Greene, Landon,Hu, Zhichao,Lee, Jeehiun K.
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- Microwave Spectrum, Dipole Moment, and Substitution Structure of Peroxyformic Acid
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The microwave spectra of peroxyformic acid (HCOOOH) and seven isotopic species have been investigated from 12 to 40 GHz.Rotational constants and all quartic centrifugal distortion constants have been adjusted from measured transition frequencies for the p
- Oldani, M.,Ha, T.-K.,Bauder, A.
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- Photooxidation of Formaldehyde in Solid Oxygen and Argon/Oxygen Matrices at 12 K
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Matrix-isolated formaldehyde in solid O2, Ar/O2, and Ar matrices at 12 K has been photolyzed by ultraviolet light in the 220 - 400 nm range.The photoproducts were identified by infrared spectroscopy.Stable oxidation products were CO, CO2, H2O, H2O2, O3, and HCOOH, whereas relatively unstable products were HO2, its hydrogen-bonded dimer (HO2)2, formylperoxy radical HC(O)OO, and performic acid.The observed photoproduct distribution is rationalized by the stoichiometry of chemical reactions involving one C atom, two H atoms, and odd numbers of O atoms in the cage.Photolysis of the Ar/O2/H2CO sample (10 percent O2 in solid Ar) gave poor yields of radical species.Under the experimental conditions employed, the photochemical oxidation process is not driven to completion, and therefore it is possible to trap reactive intermediates for spectroscopic and kinetic studies.Photodissociation threshold of H2CO and (H2CO)2 in solid Ar have been measured with tunable, pulsed UV laser photolysis to show that (H2CO)2 has a lower treshold than H2CO.
- Diem, Michael,Lee, Edward K. C.
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- Enzymatic synthesis and characterization of L-methionine and 2-hydroxy-4-(methylthio)butanoic acid (HMB) co-oligomers
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Oligomers of L-methionine (Met) and its hydroxy analogue, 2-hydroxy-4-(methylthio)butanoic acid (D,L-HMB) were synthesized with the proteolytic enzyme papain. The Met homooligomers and HMB-Met co-oligomers obtained through the enzymatic reactions were sub
- Rajesh, Mathur,Kapila, Shubhen,Nam, Paul,Forciniti, Daniel,Lorbert, Stephen,Schasteen, Charles
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- Quantitative analysis of oxidized vitamin B1 metabolites generated by hypochlorous acid
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Thiamine, a water-soluble essential vitamin known as vitamin B1, acts as an important cofactor in various cellular processes, such as metabolism and energy production. Thiamine is also thought to have antioxidant effects as a singlet oxygen scavenger and
- Sasatsuki, Hitoshi,Nakazaki, Atsuo,Uchida, Koji,Shibata, Takahiro
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- Reprint of “The benzoin condensation: Charge tagging of the catalyst allows for tracking by mass spectrometry”
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A novel thiazolium with a sulfonate charge tag was synthesized to test the feasibility of tracking the progress of a thiazolylidene-catalyzed benzoin condensation reaction using electrospray ionization-mass spectrometry (ESI–MS). Intermediates in the benz
- Zeng, Hao,Wang, Kai,Tian, Yuan,Niu, Yijie,Greene, Landon,Hu, Zhichao,Lee, Jeehiun K.
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Read Online
- High-throughput method for on-target performic acid oxidation of MALDI-deposited samples
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An information-rich on-target performic acid oxidation method, which is compatible with alkylation for differentiation of free cysteine versus disulfide-containing peptides, is described. On-target oxidation is achieved using performic acid vapor to oxidi
- Williams, Brad J.,Russell, William K.,Russell, David H.
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- Sustainable oxidative cleavage of catechols for the synthesis of muconic acid and muconolactones including lignin upgrading
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Muconic acid and muconolactones are attracting high interest as platform molecules for the synthesis of a variety of compounds, especially in the domain of materials. Although several technologies have been described for their synthesis, there is still a lack of performance, especially regarding green chemistry principles. In this study, we describe the development of an optimized catechol oxidative cleavage to muconic acid using performic acid in an intriguingly safe fashion. Common iron salts were used as catalysts to a level as low as 0.005 mol%, for a maximum turnover number of 13?200. Maximum muconic acid yield reached 84% after isolation by simple filtration. This procedure optimized on catechol was also efficient over a wide range of substituted catechols, providing access to muconolactones in a domino reaction. Noticeably, biobased catechols produced by a proven technology of lignin depolymerization were cleaved into muconolactones of high functional value. Applying this supplementary cleavage step to catechols obtained by lignin depolymerization was thus an ultimate way to maximize the economical value created from lignin. In contrast to other studies, lignin was not only depolymerized, but also depolymerization products were further transformed to take as much value from biomass as possible.
- Coupé, Florentin,Petitjean, Laurène,Anastas, Paul T.,Caijo, Frédéric,Escande, Vincent,Darcel, Christophe
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supporting information
p. 6204 - 6211
(2020/10/18)
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- Organocatalytic enantioselective sulfa-Michael addition of thiocarboxylic acids to β-trifluoromethyl-α,β-unsaturated ketones for the construction of stereogenic carbon center bearing a sulfur atom and a trifluoromethyl group
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An organocatalyzed asymmetric sulfa-Michael addition of thiocarboxylic acids to β-trifluoromethyl-α,β-unsaturated ketones with a chiral bifunctional amine-squaramide as the catalyst is presented. A wide range of chiral ketone compounds bearing a sulfur at
- Hu, Wen-Fei,Zhao, Jian-Qiang,Chen, Xiao-Zhen,Zhou, Ming-Qiang,Zhang, Xiao-Mei,Xu, Xiao-Ying,Yuan, Wei-Cheng
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p. 2206 - 2214
(2019/03/06)
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- POLYMERIZABLE COMPOUND AND OPTICALLY ANISOTROPIC BODY
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The present invention provides a compound represented by the general formula (I), and a polymerizable composition containing the compound. When the polymerizable composition containing the compound represented by the formula (I) is used to form a filmy product, the resulting filmy product exhibits less change over time in phase difference and reverse wavelength dispersion and when the filmy polymer is irradiated with UV light, peeling from a substrate is unlikely to be caused. Further, the invention provides a polymer obtained through polymerization of the polymerizable composition and an optically anisotropic body obtained using the polymer.
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Paragraph 0193; 0198
(2018/11/21)
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- METHODS FOR STERILIZATION AND/OR DISINFECTION
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Methods for killing spores include contacting the spores with an aqueous solution containing performic acid. The contacting occurs at a temperature of less than or equal to about 35° C. for a period of time of less than or equal to about 15 seconds, and t
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Paragraph 0053
(2017/02/24)
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- PERFORMIC ACID ON-SITE GENERATOR AND FORMULATOR
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Methods of generating performic acid by contacting aqueous oxidizing agent and aqueous formic acid source in liquid phase are disclosed. A system and apparatus for the in situ production of the performic acid chemistries is further disclosed. In particula
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Page/Page column 57
(2017/03/21)
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- Synthesis of enantiopure free and N-benzyloxycarbonyl-protected 3-substituted homotaurines from naturally occurring amino acids
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Enantiopure N-benzyloxycarbonyl-protected and free 3-substituted homotaurines were synthesized from naturally occurring amino acids via N-benzyloxycarbonyl protection, Arndt-Eistert homologation, reduction, esterification with thioacetic acid, and oxidation with performic acid. The current method is a convenient, practical, and salt-free method for the synthesis of enantiopure 3-substituted homotaurine with moderate to good yields.
- Zheng, Yongpeng,Xu, Jiaxi
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p. 5197 - 5206
(2014/12/10)
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- Direct oxidation of secondary alcohol to ester by performic acid
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The reaction pathways and kinetics of the oxidation reactions of 1-phenylethyl alcohol (PEA), 1-(3,4-dimethoxyphenyl)ethanol (MVA), 1-(4-hydroxy-3-methoxyphenyl)ethanol (HMOPE), 1-(3-aminophenyl)ethanol (APE), 1-(4-methylphenyl)ethanol (MPE) and cyclohexanol with performic acid (PFA) were investigated in formic acid solvent. An unexpected new reaction pathway, from which the secondary alcohols can be directly oxidized to corresponding esters, was found. The reaction products (esters and ketones) of oxidation of PEA, MVA, HMOPE, APE, MPE and cyclohexanol were detected at different reaction times. The reaction rate constants, k1, k2, k3 and power orders α, β, γ of PFA concentration for three oxidation reactions pathways: alcohol to ester, alcohol to ketone and ketone to ester were obtained, respectively. These findings might provide a new insight into the technology of lignin degradation.
- Li, Xiao-Hong,Meng, Xiang-Guang,Liu, Ying,Peng, Xiao
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supporting information
p. 3332 - 3336
(2013/12/04)
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- PROCESS FOR THE PREPARATION OF PEROXY ACIDS
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The present invention relates to a process for the preparation of a solution comprising a first peroxy acid comprising performic acid and a second peroxy acid, said process comprising forming a carboxylic acid solution comprising a first carboxylic acid comprising formic acid, a second carboxylic acid and hydrogen peroxide, wherein the amount of formic acid is from 0.5 to 20% by weight of the amount of the second carboxylic acid, and allowing the components to react to form a solution comprising performic acid and said second peroxy acid, the amount of peroxy acids being at least 5% by weight. The invention also relates to a storable solution comprising performic acid and said second peroxy acid. The solution can be used as a disinfecting agent for controlling micro-organisms.
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Page/Page column 3-4
(2009/09/08)
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- MULTI-PART ANTI-MICROBIAL STERILIZATION COMPOSITIONS AND METHODS
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The present invention relates to a two-part or multi-part concentrate system for preparing an activated solution which can be diluted with water to a use-dilution solution having improved anti-corrosive properties at room temperature. The concentrate syst
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Page/Page column 6-12
(2008/06/13)
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- Antibody specifically binding to sulfonylated protein and method for producing the same
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Provided is a method for producing an antibody binding to a sulfonylated isoform of a protein; not to a non-sulfonylated isoform of the protein and other proteins, including: providing a peptide comprised of 7 to 15 amino acids derived from the protein an
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Page/Page column 3-4
(2008/06/13)
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- Aminoalkanesulfonic acid derivatives and pharmaceutical compositions for use in preventing or treating heart diseases
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The present invention relates to a pharmaceutical composition for use in preventing or treating heart diseases in a mammal, which comprises at least one aminoalkanesulfonic acid derivative of the formula (I): STR1 wherein X is hydrogen or an amino acid residue; Y is hydrogen, a phenyl group or an alkyl group, which may have a hydroxy, amino, carboxy, phenyl or hydroxyphenyl group; or X and Y are joined to form a trimethylene or hydroxytrimethylene group; and at least one of X and Y is other than hydrogen; or pharmaceutically acceptable salt thereof.
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- Mechanism of Photooxidation of Glyoxal and Formaldehyde in Solid O2 at 12-18 K
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The UV photoxidation of solid O2/trans-H2C2O2 samples at 12-18 K gives diformylperoxyl, 2, as the most important primary product (via facile intermediacy of HCO radicals) and *2CO as an important secondary photolysis product.Degradation of these products gives HC(O)OO*CO, HCOOH*COx, H2O2*2CO, H2O*CO2, CO, and CO3.A 30 K warm-up generates H2O2*2CO from 2*2CO by thermal decomposition.The photooxidation of the solid O2/H2C2O2 system is driven less to completion than the photooxidation of the solid O2/H2CO system; because the latter system has more free radical species through the H atom recoil in the H2CO photolysis, the H atoms escape from the photolysis cage and hence a significant change in the photolysis cage stoichiometry occurs.
- Tso, Tai-Ly,Lee, Edward K. C.
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p. 5465 - 5474
(2007/10/02)
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- Process for preparing alpha-substituted acetaldehydes
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Processes are described for the preparation of 2,2,6-trimethyl-1-cyclohexen-1-ylacetaldehyde (hereinafter referred to as "beta-cyclohomocitral" which either (A) comprises the steps of: I. Oxidizing beta-ionone having the formula: SPC1 with a peralkanoic acid having the formula: EQU1 (wherein R is H, methyl or ethyl) in the presence of buffer and in the absence of dimethyl formamide, to form 2,2,6-trimethyl-1-cyclohexen-1-ylvinylacetate (hereinafter referred to as beta-ionone enol ester) having the formula: SPC2 Ii. hydrolyzing said beta-ionone enol ester using a basic hydrolysis agent to form beta-cyclohomocitral having the structure: SPC3 Or (B) oxidizing beta-ionone with hydrogen peroxide in the presence of inorganic base to form beta-cyclohomocitral, directly.
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