- Selective and mild sulfoxidation of 2-sulfylbenzothiazole using hydroperoxides derived from cyclohexanone in the absence of catalyst
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Alkyl hydroperoxides derived from cyclohexanone are attractive oxidants because they are easily available, more reactive than TBHP but much less acidic than m-CPBA. Wherein 1,1′-peroxybis(1-hydroperoxycyclohexane) (C) can be generated by the current simply method and displays the excellent reactivity and selectivity based on oxidative reactions of various benzothiazolyl sulfides substituted by different function groups. The research found that the reactions can be performed in the absence of catalyst and under very mild conditions optimized. Yields of sulfoxides is higher than 90%, no or a little reaction happened at the proximal double bond、 N and S atoms in the benzothiazolyl moiety. Phenyl sulfide as the substrates was also examined for the reaction scope test. The results show that they were uniquely and completely oxidized to sulfoxides in 1 h. A mild, environmentally friendly, catalyst-free aryl sulfide sulfoxidation method has been developed.
- Shi, Wenjun,Yu, Chunmian,Zhou, Xinrui,Zhu, Shihao
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supporting information
(2021/05/26)
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- METHOD FOR PRODUCING ESTER OR LACTONE
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Disclosed is a method for producing an ester or lactone in which a secondary alcohol represented by following Formula (1) (wherein Ra and Rb each represent an organic group, or Ra and Rb may be combined to form a ring together with the adjacent carbon atom) is oxidized by molecular oxygen in the presence of a nitrogen-containing cyclic compound containing a structure represented by following Formula (I) [wherein X represents an oxygen atom or an -OR group (wherein R represents a hydrogen atom or hydroxyl-protecting group)] as a constituent of its ring, and at least one of a fluorine-containing alcohol and a fluorinated sulfonic acid, and thereby yields a compound represented by following Formula (2):
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Page/Page column 25-26
(2009/12/07)
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- Process for producing organic peroxides
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A process of the invention allows a cycloalkane to react with oxygen in the presence of a catalytic imide compound having an N-hydroxy (or N-oxo) cyclic imide skeleton and thereby yields a corresponding bis(1-hydroxycycloalkyl)peroxide. The catalytic imide compound includes, for example, a compound represented by following Formula (1): wherein R1 and R2 are each, for example, a hydrogen atom, a halogen atom, an alkyl group, an aryl group or a cycloalkyl group, where R1 and R2 may be combined to form a double bond, an aromatic or non-aromatic ring; and X is an oxygen atom or a hydroxyl group. The cycloalkane includes, for example, a cycloalkane having from 5 to 15 members. The invention can easily produce bis(1-hydroxycycloalkyl)peroxide from an inexpensive material.
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- O17 isotopic peroxides
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The peroxides which include the O17 isotope, especially the hydrogen peroxides and peroxides and hydroperoxides prepared therefrom, are well adapted as nonradioactive labeled compounds for use in the medicinal and biological arts.
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- Peroxide-initiated Reaction of Secondary Alcohols with Carbon Tetrachloride on a Zinc Oxide Surface
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A free radical initiated chain reaction has been found to take place in mixtures of secondary alcohols with carbon tetrachloride on a zinc oxide surface, resulting in the formation of the corresponding ketones with concomitant formation of chloroform and hydrogen chloride.The peroxide impurities that are present in the secondary alcohols are found to undergo homolysis on the surface of zinc oxide to form reactive free radicals which initiate a free radical chain reaction in the secondary alcohols and carbon tetrachloride.
- Sudhakar, Ch.,Rao, V. R. S.,Kuriacose, J. C.
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p. 693 - 695
(2007/10/02)
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- Role of Hydroperoxides in the Ozonized Oxidation of Cycloalkanes
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Rate constants have been determined for the action of ozone on cyclohexyl and 1-methylcyclohexyl hydroperoxides, which are formed by the oxidation of of cyclohexane and methylcyclohexane respectively.The reactivity of peroxy-compounds towards ozone diminishes in the sequence-cyclohexylhydroperoxide (I) > peroxydicyclohexane-1,1'-diol (IV) > 1,1'-hydroperoxycyclohexylperoxycyclohexanol (III) > peroxy-1,1'-dicyclohexane dihydroperoxide (V) > 1-methylcyclohexylhydroperoxide (II).
- Vikhorev, A. A.,Syroezhko, A. M.,Proskuryakov, V. A.,Korotkova, N. P.
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p. 251 - 253
(2007/10/02)
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- Ketone-derived Peroxides. Part I. Synthetic Methods.
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Study of the reactivity of peroxides derivable from ketones by reaction with hydrogen peroxide has required reexamination of preparative methods.Conditions for obtaining five known peroxides from cyclohexanone and the new 1-(1-hydroxycyclohexyldioxy)-1-(1-hydroperoxycyclohexyldioxy)cyclohexane (10) are carefully defined.An improved general method for obtaining cyclic diperoxides (3,3,6,6-tetrasubstituted 1,2,4,5-tetraoxans) (6) has been developed and used to obtain new diperoxides from dibenzyl ketone, di-(4-methylbenzyl) ketone and 2,2-dimethylcyclohexanone whereas indan-2-one and 5,7-dihydro-6H-dibenzocyclohepten-6-one yield the corresponding triperoxides (1,2,4,5,7,8-hexoxonans) (7) and 1,5-diphenylpentan-3-one yields bis-(1-hydroperoxy-1-phenethyl-3-phenylpropyl) peroxide (5k).Ozonolysis of appropriate alkenes has been used to obtain new cyclic diperoxides formally related to 4'-methylacetophenone, propiophenone and deoxybenzoin.
- McCullough, Kevin J.,Morgan, Alistair R.,Nonhebel, Derek C.,Pauson, Peter L.,White, Graham J.
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p. 601 - 628
(2007/10/02)
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- Oxidation of ketones to esters
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Cyclic ketones can be oxidized in high yields to the corresponding cyclic esters with hydrogen peroxide, selenium dioxide catalyst and a base. By-products are held to a minimum.
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