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Pentafluorobenzyl hydroxylamine PFBHA

Methylation with diazomethane is rarely apphed as the only derivatization step to short-chain organic acids.It is, however, used in combination with o-(2,3,4,5,6-pentafluorobenzyl)-hydroxylamine (PFBHA) for ketoacids (see below). Once diazomethane has been generated, it is added to the extract which can then be injected in the GC, thus making this reagent rather convenient. Heating of the sample mixture is not required since the reaction takes place at low temperatures. The major disadvantages of diazomethane are its hazardous and explosive nature, and the necessity to generate it before it can be applied. ... [Pg.472]

Pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA) [57981-02-9] M 249.6, m 215 , 215-216 , pKgst 1.1. Recrystd from EtOH to form colourless leaflets. Drying the compound at high vacuum and elevated temperature will result in losses by sublimation. [Youngdale J Pharm Sci 65 625 7976 Wehner and Handke J Chromatog 177 237 7979 Nambara et al. give incorrect m as 115-... [Pg.321]

O-Ethyl hydroxylamine (HCl) O-Pentafluorobenzyl hydroxylamine hydroxylamine (HCl) (PFBHA) Hydroxylamine (HCl) (with following silylation of oximes) Methanol/H+... [Pg.432]

See other pages where Pentafluorobenzyl hydroxylamine PFBHA is mentioned: [Pg.124]    [Pg.314]    [Pg.124]    [Pg.314]    [Pg.323]    [Pg.132]    [Pg.454]   
See also in sourсe #XX -- [ Pg.2 , Pg.3 , Pg.4 , Pg.5 , Pg.6 ]



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Pentafluorobenzyl

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