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Ethyl 4-nitrophenyl ethylphosphonate

The kinetics of the basic hydrolysis of ethyl / -nitrophenyl ethylphosphonate (190) in the SDS-hexanol-water reverse micellar system has shown that at high pH and low water content the reaction occurs in the surface layer and is adequately described by a pseudo-phase model.The reactivity of ethyl aryl chloromethylphosphonates (191 X = NO2, Br, H, Et, Bu, n-octyl) in the basic hydrolysis reactions in direct micelles of cetyltrimethylammonium bromide depends on both the electronic and the hydrophobic... [Pg.96]

In a kinetic study of the reactions of a series of hydroxamates, RCONHO-, with ethyl p-nitrophenyl ethylphosphonate (67 R = Et) and diethyl 4-nitrophenyl phosphate (67 R = OEt), their known typical a-nucleophile reactivities were in evidence, but anomalously high nucleophilicity was observed for anions possessing substituents... [Pg.64]

The reactions of p-nitrophenyl toluenesulfonate (147) and 2,4-dinitrophenyl toluene-sulfonate (148) with a wide range of oximate ions (p/fa = 7-13) in 10% aqueous ethanol at 25 °C have been studied. For oximate ions with p/fa > 9.0, the reactivity of the oximes tends toward that of alcoholate ions and their a-effect disappears [as was also shown with /7-nitrophenyl diethyl phosphate (128) and ethyl jo-nitrophenyl ethylphosphonate (129)]. The reason for this is the unfavourable solvation effects of... [Pg.85]

S-ethyl, 2-(2 -imidazolyl)-4-ethenylphenyl (l-(N-tert butoxycarbonylamino)-2-phenyl) ethylphosphonate, S -0- (N-tert-butoxycarbonyl-L-phenylalanyl) -2-( N-metha-cryloylamino)-3-(5 -imidazolyl) propanol or their derivatives MAA EDMA CH2CI2, CHCI3 or benzene Using substrate analog or transition state analog enantioselective ester hydorolysis of N-tert- butoxycarbonyl phenylalanine p-nitrophenyl ester [173)... [Pg.112]


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