Results 331 to 340 of about 319,390 (394)

Determination of acetic anhydride in presence of acetic acid

Microchemical Journal, 1965
Summary Acetic anhydride, in the presence of pyridine, reacts quantitatively with anhydrous oxalic acid to form acetic acid, carbon dioxide, and carbon monoxide. Based on this reaction, two small-scale procedures have been devised for the determination of this anhydride.
I.C. Shukla, J.P. Sharma, R.D. Tiwari
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Thermokinetic analysis of the stability of acetic anhydride hydrolysis in isothermal calorimetry techniques

Journal of Thermal Analysis and Calorimetry, 2021
Ye-cheng Liu, A. Huang, Yan Tang, Chung-Fu Huang, Qing Shen, C. Shu, Zhi-Xiang Xing, Jun-cheng Jiang   +7 more
semanticscholar   +1 more source

Nitration of dimethylnaphthalenes in acetic anhydride

Journal of the Chemical Society B: Physical Organic, 1969
The nitration of eight dimethylnaphthalenes, and of acenaphthene, in acetic anhydride at 0° has been studied, and the isomer proportions of the products and the rates relative to naphthalene determined. The partial rate factors thence derived are discussed in terms of various steric effects and the applicability of the Additivity Rule is examined.
Keith D. Warren, Alun Davies
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Pd(II)-catalyzed regio-, enantio-, and diastereoselective 1,4-addition of azlactones formed in situ from racemic unprotected amino acids and acetic anhydride.

Journal of Organic Chemistry, 2012
A multicomponent reaction is reported generating highly enantioenriched and diastereomerically pure quaternary amino acid derivatives via 1,4-addition of azlactones to enones.
Manuela Weber, R. Peters
semanticscholar   +1 more source

New insight on an old reaction – the aqueous hydrolysis of acetic anhydride

, 2012
Studies have shown that aqueous reactions generating a change in pH can be accurately monitored using a fast-response pH electrode. This technique has been successfully applied in this work to the aqueous hydrolysis of acetic anhydride, which is a ...
F. Wiseman
semanticscholar   +1 more source

The reaction of phenylnitromethane with acetic anhydride/sodium acetate

Tetrahedron, 1975
Abstract Reaction of phenylnitromethane with acetic anhydride/sodium acetate at 80–85° produces N-benzoyl-N,O-diacetylhydroxylamine, which can be isolated in 30% yield. This compound was proposed previously as an intermediate in a similar reaction which had yielded only benzoic anhydride, triacetylhydroxylamine and acetanilide.
D.W. Neiswander, Frank R. Stermitz
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Synthesis of 1,2‐Naphthalenediol Diacetates by Rhodium(II)‐Catalyzed Reaction of 1,2‐Diazonaphthoquinones with Acetic Anhydride

, 2012
A metal-catalyzed reaction of α-diazocarbonyl compounds with an acid anhydride is reported. In particular, 1,2-naphthalenediol diacetates were synthesized by the reaction of 1,2-diazonaphthoquinones with acetic anhydride catalyzed by Rh2(OAc)4.
Mitsuru Kitamura, Masato Kisanuki, T. Okauchi   +2 more
semanticscholar   +1 more source

Direct titanium-mediated conversion of ketones into enamides with ammonia and acetic anhydride.

Angewandte Chemie, 2012
N-Acyl enamides are useful compounds in organic synthesis. In the realm of catalytic asymmetric hydrogenation, they are among the most exhaustively studied class of substrates, and provide access to valuable chiral amine building blocks. These substrates
J. Reeves, Zhulin Tan, Z. Han, Guisheng Li, Yongda Zhang, Yibo Xu, Diana C. Reeves, N. Gonnella, Shengli Ma, Heewon Lee, B. Lu, C. Senanayake   +11 more
semanticscholar   +1 more source

Acetic anhydride as a synthetic reagent

Journal of Heterocyclic Chemistry, 1976
AbstractAcetic anhydride has been used widely in synthetic organic chemistry, especially in syntheses and transformations of heterocyclic compounds. These utilities are reviewed under the following classification.
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Reaction of hexafluoroacetone with acetic anhydride

Bulletin of the Academy of Sciences, USSR Division of Chemical Science, 1966
When acetic anhydride reacts with hexafluoroacetone it acts not as an acetylating agent, but as a compound containing an active methylene group.
I. L. Knunyants, Yu. V. Zeifman
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