Method for preparing bromodifluoroacetic compounds

Details Method for preparing bromodifluoroacetic compounds Method for preparing bromodifluoroacetic compounds

2005-06-14

2005-06-14

Richter, Johann (Department: 1621)

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

Organic compounds

Carboxylic acid esters

C562S604000

Reexamination Certificate

active

06906219

ABSTRACT:
The invention relates to a method for preparing bromodifluoroacetic compounds which comprises converting a 1,1-difluoro-1,2-dibromodihaloethane with oleum having 50-70% SO3to a bromodifluoroacetyl halide (bromide or chloride) and then in reacting the latter directly with either an alcohol, or with water.

REFERENCES:
patent: 4340548 (1982-07-01), Anello et al.
patent: 1020970 (1957-12-01), None
General Chemical Corporation , Technical Service Report No. 52.79, Recommendendations for the Storage and Handling of 15% to 25% and 65% Commerical Oleum, 1997, Delaware.
Abstract of JP 11080084 along with an English translation of entire article.
G.A. Grindahl et al.; “The Preparation and Coupling of Some Alpha-Haloperfluoromethyl-s-triazines”—Journal of Organic Chemistry., vol. 32, 1967, pp. 603-607, XP002192250, American Chemical Society, Easton., U.S. ISSN: 0022-3263.
Morel et al.: “Synthese d'un nouveau monomere hydrofluorocarboxylique: Le difluoro-2,2-butene-3-oate d'ethyle” Tetrahedron., vol. 33, 1977, pp. 1445-1447, XP002192251, Elsevier Science Publishers, Amsterdam, NL, ISSN: 0040-4020.

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