Stereochemical and kinetic studies on the Pummerer reaction of arylsulphinylcyclopropanes and phenylsulphinylmethylcycloalkanes with acetic anhydride

1978 ◽  
pp. 1302 ◽  
Author(s):  
Toshiaki Masuda ◽  
Tatsuo Numata ◽  
Naomichi Furukawa ◽  
Shigeru Oae
Keyword(s):  
Acetic Anhydride ◽  
Kinetic Studies ◽  
Pummerer Reaction

KINETIC STUDIES ON THE ACID-CATALYZED PUMMERER REACTION OF α-(METHYLSULFINY)ACETOPHENONES

1983 ◽  
Vol 16 (1-2) ◽  
pp. 223-232 ◽  
Author(s):  
Norio Kunieda ◽  
Yoichi Fujiwara ◽  
Akira Suzuki ◽  
Masayoshi Kinoshita
Keyword(s):  
Kinetic Studies ◽  
Pummerer Reaction ◽  
Acid Catalyzed

scholarly journals Acetylation of Eugenol over 12-Molybdophosphoric Acid Anchored in Mesoporous Silicate Support Synthesized from Flint Kaolin

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2995 ◽  
Author(s):  
Alex de Nazaré de Oliveira ◽  
Erika Tallyta Leite Lima ◽  
Deborah Terra de Oliveira ◽  
Rômulo Simões Angélica ◽  
Eloisa Helena de Aguiar Andrade ◽  
...  
Keyword(s):  
Acetic Anhydride ◽  
Acid Catalyst ◽  
Kinetic Studies ◽  
Molar Ratio ◽  
Molybdophosphoric Acid ◽  
Mesoporous Silicate ◽  
First Order Kinetics ◽  
Eugenyl Acetate ◽  
Heterogeneous Acid Catalyst ◽  
Excellent Stability

A new prepared catalyst, 12-molybdophosphoric acid (HPMo) anchored to the mesoporous aluminosilicate AlSiM, synthesized from Amazon kaolin, was characterized and used as a heterogeneous acid catalyst for the production of eugenyl acetate by acetylation of eugenol with acetic anhydride. The effect of various reaction parameters, such as catalyst concentration, eugenol/acetic anhydride molar ratio, temperature and reaction time, was studied to optimize the conditions of maximum conversion of eugenol. The kinetics studies showed that in eugenol acetylation, the substrate concentration follows a first order kinetics. The results of activation energy was 19.96 kJ mol−1 for HPMo anchored to AlSiM. The reuse of the catalyst was also studied and there was no loss of catalytic activity after four cycles of use (from 99.9% in the first cycle to 90% in the fifth cycle was confirmed), and an excellent stability of the material was observed. Based on catalytic and kinetic studies, HPMo anchored to AlSiM is considered an excellent catalyst.

Kinetic studies on the reactions of 2- and 4-alkyl-substituted heteroaromatic N-oxides with acetic anhydride

1968 ◽  
Vol 9 (8) ◽  
pp. 917-922 ◽  
Author(s):  
S. Oae ◽  
S. Tamagaki ◽  
T. Negoro ◽  
K. Ogino ◽  
S. Kozuka
Keyword(s):  
Acetic Anhydride ◽  
Kinetic Studies

Acetylation of Pomelo Peel for the Production of Oil Materials

2014 ◽  
Vol 955-959 ◽  
pp. 2534-2538
Author(s):  
Jun Chen Zou ◽  
Xiao Yan Liu ◽  
Wen Bo Chai ◽  
Xin Ying Zhang ◽  
Yu Sen Liu
Keyword(s):  
Acetic Anhydride ◽  
Correlation Coefficients ◽  
Kinetic Studies ◽  
Sorption Kinetics ◽  
Lubricating Oil ◽  
Order Kinetic ◽  
Pomelo Peel ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Spilled Oil

Pomelo peel was esterified with acetic anhydride using 4-dimethyl-amino pyridine as a catalyst under reaction temperature of 60 °C and duration of 3 h. At 0.1 g 4-dimethyl-amino pyridine of the catalyst in 80 ml acetic anhydride, the highest sorption values of 14.95 g/g diesel and 18.39 g/g lubricating oil were achieved, which was found to be much higher than raw pomelo peel. FTIR and SEM studies produced evidence for acetylation. The sorption kinetics and reusability were studied. The kinetic studies show good correlation coefficients for a pseudo-second-order kinetic model. This work demonstrated that pomelo peel modified by acetic anhydride is an efficient and environment-friendly biosorbent for the removal of spilled oil.

Pummerer Reaction of Sulfoxides in Acetic Anhydride Catalyzed by Al-MCM-41

2016 ◽  
Vol 45 (1) ◽  
pp. 16-18 ◽  
Author(s):  
Suguru Ito ◽  
Yoshihiro Kubota ◽  
Masatoshi Asami
Keyword(s):  
Acetic Anhydride ◽  
Pummerer Reaction ◽  
Mcm 41

The catalytic oxidation of ethylene on palladium films

1962 ◽  
Vol 270 (1341) ◽  
pp. 219-231 ◽  
Keyword(s):  
Acetic Acid ◽  
Acetic Anhydride ◽  
High Pressures ◽  
Kinetic Studies ◽  
Side Reaction ◽  
Reaction Scheme ◽  
Zero Order ◽  
Main Reaction ◽  
Rate Of Reaction ◽  
Low Pressures

The oxidation of ethylene has been studied on evaporated films of palladium in the temperature range 50 to 140 °C, and products were analyzed by means of a mass spectrometer. The main reaction was complete oxidation to carbon dioxide and water, but trace amounts of acetic anhydride and acetic acid were formed by a side reaction. Kinetic studies showed that the reaction was zero order with respect to the pressure of oxygen, first order in ethylene at low pressures but zero order at high pressures, and progressively poisoned by the two minor products. The activation energy associated with the initial rate of reaction was 14 kcal/mole. A number of subsidiary experiments were carried out including the oxidation of acetaldehyde at 77 °C which occurred rapidly producing acetic anhydride and some acetic acid. A reaction scheme was developed which accounted for the detailed kinetic behaviour of the oxidation of ethylene and possible mechanisms are discussed

scholarly journals PARTIAL ASYMMETRIC PUMMERER REACTION OF ARYL PROP-2-YNYL SULFOXIDE WITH ACETIC ANHYDRIDE

1977 ◽  
Vol 6 (8) ◽  
pp. 909-912 ◽  
Author(s):  
Tatsuo Numata ◽  
Osamu Itoh ◽  
Shigeru Oae
Keyword(s):  
Acetic Anhydride ◽  
Pummerer Reaction
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