Hydrazones reactions

The reactions involving either benzophenone hydrazone or w-hexylamine have been studied by reaction calorimetry. The benzophenone hydrazone reaction presents zero order kinetics, while the hexylamine reaction is first order in the aryl halide and zero order in the amine. Under synthetically relevant conditions, at 90°C, the rate of the hexylamine reaction is about 30-fold higher than the rate of the benzophenone reaction. [Pg.223]

Enantiomerically pure nitrile imines (211) have also been generated by the lead tetraacetate oxidation of aldehydo sugar p-nitrophenyl hydrazones. Reaction with methyl acrylate gave the pyrazolines as a 1 1 mixture of the (55) and (5R) epimers, which were resolvable in some cases (116). [Pg.507]

Diphenylacetyl-l,3-indandione-l-hydrazone reaction with aldehydes and... [Pg.112]

A number of reactions of nitrogen-containing nucleophiles with aldehydes and ketones involve addition of the nitrogen to the carbon of the carbonyl group, followed by elimination of water to produce a double bond. Common examples are reactions of primary amines to produce substituted imines, reactions of secondary amines to produce enamines, reactions of hydrazine or substituted hydrazines to produce hydrazones, reactions of semicarbazides to give semicarbazones, and reactions of hydroxylamine to produce oximes. Usually these reactions are run with an acid catalyst. [Pg.128]