The spontaneous and the acid-catalyzed hydrolyses of acetic anhydride have been measured as a function of temperature over the range 0 to 40 °C, as a function of pressure over the range 0 to 3kb at 0 °C, and as a function of solvent over the range 0 to 70.3% w/w acetone–water...
Interestingly, β-sultams do not undergo aminolysis under aqueous conditions but are rather hydrolyzed at the sulfonyl center via an amine base-catalyzed mechanism (Scheme 35). Both 2,2-dimethyl-3-oxo-β-sultam 136 and N-benzoyl-β-sultam 138 underwent amine-catalyzed hydrolysis affording the ...
The rate of hydrolysis of acetic anhydride at 25 掳C. in water (I), in solutions of methyl ethyl ketone (MEK) in water (II), and in solutions of water in MEK (III) have been studied. In I the observation of previous investigators that the velocity constant varies linearly with the ...
The kinetic modelling of the batch synthesis of acetic acid from acetic anhydride was investigated. The kinetic data of the reaction was obtained by conducting the hydrolysis reaction in a batch reactor. A dynamic model was formulated for this process and simulation was carried out using gPROMSR ...
Kinetics and mechanism of the reaction of pyridinamine 1-oxides with acetylating agents in water and aprotic solvents Pyridin-2-amine 1-oxides react with acetic anhydride in dioxan and with p-nitrophenyl acetate in water by rate-determining O-acetylation followed by rapid intramolecular rearrangement...
Comments on the paper titled 鈥淗ydrolysis of acetic anhydride: Non-adiabatic calorimetric determination of kinetics and heat exchange鈥 by Wilson H. Hirota, Rodolfo B. Rodrigues, Cl谩udia Sayer, Reinaldo Giudici published in Chemical Engineering Science, 65 (2010) 3849鈥 3858...
mechanism of sequence-specific peptide bond cleavage is used by Nature (e.g. Hedgehog protein, intein system) as the first step of the protein splicing process [2,16]. In this case, however, a Cys thiol, rather than a Ser/Thr hydroxyl is a preferred acyl group acceptor, and ...
The Hydrolysis of Carboxylic Anhydrides. V.1,2 The Acid Hydrolysis of Acetic and Trimethylacetic Anhydride The acid hydrolysis of trimethylacetic anhydride follows an A-2 mechanism in both water and aqueous dioxane and is slower than that of acetic anhydride. These observations suggest that the ...
This invention is to compatibility aids containing polyolefinic succinimide polyamide alkyl acetoacetate or trialkyl acetic anhydride adducts of the general formula: ##STR1## wherein Z 1 and Z 3 are the same or different and are moitie... A Gutierrez,J Emert,RA Kleist,... - US 被引量: ...
(1996). "Applications of temperature scanning in kinetic investigations: The hydrolysis of acetic anhydride," Chemical Engineering Science 51(20), 4681-4692.S. P. Asprey, B. W. Wojciechowski, N. M. Rice, and A. Dorcas, "Appli- cations of temperature scanning in kinetic investigations: The...