Process for preparing pyridinium fluorochromate (VI)

Details Process for preparing pyridinium fluorochromate (VI) Process for preparing pyridinium fluorochromate (VI)

2005-02-08

2005-02-08

Tsang, Cecilia J. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

06852859

ABSTRACT:
The present invention relates to an economic and environmentally clean process for the preparation of the pyridinium salt of fluorotrioxo-chromate (VI), PFC, having the chemical formula C5H5NH[CrO3F], by direct reaction of stoichiometric amounts of hydrofluoric acid, chromium trioxide and pyridine demonstrating approxomately 100% atom economy.

REFERENCES:
Manabendra N. Bhattacharjee, et al., “Pyridinium Fluorochromate; A New and Efficient Oxidant for Organic Substrates”, Synthesis, 1982,pp. 588-590, XP001153119.
Mihir K. Chaudhuri, et al., “Easy synthesis of puridinium fluorochromate, C5H5NH[CrO3F], and its crystal structure”, Journal of Fluorine Chemistry, 81 (1997) 211-213.
Manabendra N. Bhattacharjee, et al., “Pyridinium Fluorotrioxochromate(VI), (C5H5NH)[CrO3F]”, Inorganic Synthesis, vol. 27, 1990, pp. 310-312, XP009012349.
Pablo Lorenzo-Luis, et al., “Fluorochromate (VI) of pyridinium” Anales de Quimica Inct. Ed., vol. 93, 1997, pp. 46-49.
International Search Report of International Application No. PCT/IB02/05535, file Dec. 16, 2002.

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