Study of Extraction Equilibria in the Reaction of Alkaline Hydrolysis of Activated Amino Acid Esters / Badanie Równowag Ekstrakcji W Reakcji Zasadowej Hydrolizy Aktywowanych Estrów Aminokwasów

• Authors: Victor S. Doroshkevich , Oksana V. Baranova , Aleksandr N. Shendrik , Aleksandr S. Doroshkevich , Olena S. Lygina , Svitlana B. Lyubchyk
• Languages of publication: EN

Abstracts

EN

Correlation between observed kinetic effects of phase-transfer catalytic reaction of the alkaline hydrolysis of 4-nitrophenyl ester of N-benzyloxycarbonylglycine-4 in the two-phase system chloroform-borate buffer pH = 10 and a content of ionic forms of catalyst was investigated. The phosphonium salts QX (X = Cl¯, Br¯, I¯) shows high catalytic reactivity. Dependence of the reaction kinetics discussed in the framework of the extraction mechanism with a competitive extraction of a nucleophile ОН¯, nucleofuge 4-NO2C6H4O¯ and anion X¯ of the phase-transfer catalyst.

PL

Zbadano korelację pomiędzy obserwowanym efektem kinetycznym przejścia fazowego katalitycznej reakcji zasadowej hydrolizy estru 4-nitrofenylowego N-benzyloksycarbonylglycyny-4 w dwufazowym układzie chloroform-bufor boranowy, pH = 10, z zawartością jonowych form katalizatora. Sole fosfoniowe QX (X = Cl¯, Br¯, I¯) wykazują wysoką aktywność katalityczną. Zależności kinetyki reakcji przeanalizowano w ramach mechanizmu ekstrakcji z konkurencyjną ekstrakcją nukleofilu ОН¯, grupą odchodzącą 4-NO2C6H4O¯ i anionem X¯ katalizatora przejścia fazowego.

Keywords

EN

phase-transfer catalysis; kinetics; hydrolysis; quaternary phosphonium salts; branched catalytic cycle; extraction equilibria

PL

kataliza przejścia fazowego; kinetyka; hydrolizy; czwartorzędowe sole fosfoniowe; rozgałęziony cykl katalityczny; równowagi ekstrakcji

• Publisher: De Gruyter Open
• Journal: Chemistry-Didactics-Ecology-Metrology
• Year: 2014
• Volume: 19
• Issue: 1-2
• Pages: 69-77

Dates

published

1 - 12 - 2014

online

6 - 2 - 2015

Contributors

author

Victor S. Doroshkevich

• Chemical Department, Donetsk National University, ul. Shorsa 17a, Donetsk, 83001, Ukraine, phone [phone]

author

Oksana V. Baranova

• Chemical Department, Donetsk National University, ul. Shorsa 17a, Donetsk, 83001, Ukraine, phone [phone]

author

Aleksandr N. Shendrik

• Chemical Department, Donetsk National University, ul. Shorsa 17a, Donetsk, 83001, Ukraine, phone [phone]

author

Aleksandr S. Doroshkevich

• Donetsk Institute of Physics and Engineering, NASU, Donetsk, 83114, Ukraine
• Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia

author

Olena S. Lygina

• Universidade Nova de Lisboa, Portugal, 2829-516 Caparica Ext.: 12201/3/4/5

author

Svitlana B. Lyubchyk

• Universidade Nova de Lisboa, Portugal, 2829-516 Caparica Ext.: 12201/3/4/5

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Identifiers

DOI

10.1515/cdem-2014-0006