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Neighboring amide group participation in ester aminolysis in aprotic solvents

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Abstract

The piperidinolysis of 8-quinolyl-, p-nitrophenyl-, o-, and p-piperidinocarbonylphenyl acetates in acetonitrile and in chlorobenzene was studied at 25°C. The strictly second order kinetic behaviour and the weaks solvent-dependence of the rate of the reaction of o-piperidinocarbonylphenyl acetate indicate anchimeric assistance by the o-amide group, and support the suggestion that amide groups of hydrophobic enzyme active sites may act as general base catalysts.

Abstract

Был исследован пиперидинолиэ 8-хинолил-, п-нитрофенил-, о- и п-пиперидинокарбонилфенил ацетатов в ацетонитриле и хлорбенэоле при 25°C. Кинетическое поведение строго второго порядка и слабая эависимость скорости реакции о-пиперидинокарбонилфенил ацетата от растворителя укаэывают на анхимерическое влияние о-амидной группы и подтверждают то предположение, согласно которому амидные группи активных центров гидрофобных энзимов действуют как обычные основные катализаторы.

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Kőmives, T., Márton, A.F. & Dutka, F. Neighboring amide group participation in ester aminolysis in aprotic solvents. React Kinet Catal Lett 4, 43–48 (1976). https://doi.org/10.1007/BF02073968

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  • DOI: https://doi.org/10.1007/BF02073968

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