Kinetics of cyclization of 1-phenyl-3-(1, 2-dimethyl-3-oxo-1-butenyl) urea and ethyl 2-methyl-3-N-(N'-phenylureido)-2-butenoate

J Kaválek, J Hruška, V Štěrba

Index: Kavalek, Jaromir; Hruska, Jiri; Sterba, Vojeslav Collection of Czechoslovak Chemical Communications, 1982 , vol. 47, # 2 p. 518 - 522

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Citation Number: 2

Abstract

Abstract 1-Phenyl-3-(1, 2-dimethyl-3-oxo-1-butenyl) urea (III) has been prepared by reaction of phenyl isocyanate with 4-amino-3-methyl-3-penten-2-one (I). Ethyl 2-methyl-3-N-(N'- phenylureido)-2-butenoate (V) has been prepared by analogous reaction with ethyl 3-amino- 2-methyl-2-butenoate (II). Kinetics have been measured of acid and base catalyzed cyclization of III and that of base catalyzed cyclization of V giving 1-phenyl-4, 5, 6- ...