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SUBJECTS chlorochromic acid

The kinetics of oxidative deoximation (in AcOH) ofiV-methyl-2,6-diphenyl piperidin-4-one oximes by acid dichromate and of 3,5-dimethyl-2,6-diaryl piperidin-4-one oximes by pyridinium chlorochromate have been detennined and are found to be consistent with polar mechanisms, first order in each reactant and subject to acid catalysis. [Pg.14]

The kinetics of the oxidation of a series of para- and meto-substituted benzaldehydes by quinolinium chlorochromate are first order in substrate, oxidant, and hydronium ion the results were subjected to a Taft analysis. Oxidation of 2-pyridinecarboxaldehyde to the acid by dichromate follows an unusual mixed fourth-order rate law it is first order in hydronium ion and Cr(VI), and second order in aldehyde. [Pg.28]

When 125 was subjected to a two-step sequence, reductive cleavage of the 0-0 bond and subsequent oxidative dehydration, by treatment with zinc in AcOH, the allylic diol 135 and the 1,2-oxazocine 126, as minor product, were isolated. Oxidation of the diol 135 under several different reaction conditions (pyridinium chlorochromate (PCC), 2-iodoxybenzoic acid (IBX)/EtOH, IBX/DMSO, Pyr/SOj) gave 126 in high yield (68-92%), while with tetrapropylammonium perruthenate/Wmethylmorphaline Ar-oxidc (TPAP/NMO) as oxidizing agent 126 was the minor product and the a,/3-unsaturated 7-butyrolactone 136 was obtained in 68% yield (Scheme 28) <2005JOC6995>. [Pg.127]


See other pages where SUBJECTS chlorochromic acid is mentioned: [Pg.578]    [Pg.180]    [Pg.6]    [Pg.180]    [Pg.139]    [Pg.191]    [Pg.298]    [Pg.175]    [Pg.57]   
See also in sourсe #XX -- [ Pg.718 ]




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Chlorochromate

Subject acidity

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