Polarography as a tool in organic analysis. Part II

Gawargious, Y. A.; Habashy, G.M.; Bishara, S. W.

doi:10.1007/bf01224409

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Page 146 In view of the importance of reductive removal of the N-oxide oxygen in synthetic heterocyclic chemistry, the reagents described, especially the TFAA-I, offer an attractive alternative to earlier methods.…”

Section: Issn 1424-6376mentioning

confidence: 99%

Trifluoroacetic anhydride-sodium iodide reagent. Nature and applications

Kudzin¹,

Kudzin²,

Drabowicz³

et al. 2007

Arkivoc

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Trifluoroacetic anhydride -sodium iodide mixture (TFAA-NaI; TFAA-I) reacts with several compounds bearing semipolar X-O bond, usually in the mode of deoxygenation, with liberation of iodine. The results of systematic investigations of the TFAA-I-reaction with various types of S-oxo and N-oxo compounds were discussed. The majority of these reactions are characterized by quantitative course, with respect to both X-O substrate transformation as well as to the amounts of liberated iodine. On this basis, a variety of sulphoxides and sulphimides were successfully reduced to sulphides and/or arene-N-oxides to amines, using TFAA-I at ambient temperature. Arene-and alkyl-sulphonic acids were reduced to the corresponding thiol derivatives in moderate yields. Stoichiometric course of the TFAA-I reaction with several S-oxo and N-oxo compounds gave origin to their analytical determinations. Thus, due to stoichiometric amounts of iodine formed from sulphoxides, sulphimides, arene-N-oxides, nitrones and nitroxide radicals, and nitroso compounds -the TFAA-I reagent can be applied to their analytical determination (titrimetric on µmol and spectrometric on nmol scale) and/or TLC detection.

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Section: Issn 1424-6376mentioning

confidence: 99%

Trifluoroacetic anhydride-sodium iodide reagent. Nature and applications

Kudzin¹,

Kudzin²,

Drabowicz³

et al. 2007

Arkivoc

View full text Add to dashboard Cite

show abstract

“…Nitro groups and nitroso groups can be determined in the presence of one another by using a two-step polarographic procedure in which TiCl3 is used as reducing agent (71). The nitroso group is reduced at pH 0.5 and the nitro group at pH 5.5. Titanium trichloride has been used to determine substituted nitrofurans (36).…”

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confidence: 99%