Method for producing alkenone ethers

Details Method for producing alkenone ethers Method for producing alkenone ethers

2008-07-29

2008-07-29

Witherspoon, Sikarl A (Department: 1621)

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

Organic compounds

Oxygen containing

C568S407000, C568S408000

Reexamination Certificate

active

07405328

ABSTRACT:
In a method or producing haloalkenone ethers by addition of a carboxylic acid halide to a vinyl ether and subsequent elimination of hydrogen halide, the improvement comprising carrying out the reaction in the absence of a base and/or in the presence of a stabilizer for the resulting alkenone, whereby higher yields of the desired alkenone product can be obtained.

REFERENCES:
patent: 5708175 (1998-01-01), Koyanagi et al.
F. Effenberger et al. “Die Acylierung von Enolethem mit reaktiven Carbonsäurechloriden”, Chemische Berichte., vol. 115, 1982, pp. 2766-2782, XP002295515, Verlag Chemie GmbH Weinheim., DE p. 2770—p. 2271—p. 2275.
L, F. Tietze et al., “Synthesis of Alkyl Propanoates by Haloform Reaction of a Trichloro Ketone”, Organic Synthesis., vol. 69, 1990, pp. 238-244, XP008037891, USWiley and Sons, New York, NY pp. 238-240.
A. Colla et al., “Trihaloacetylated Enol Ethers—General Synthetic Procedure and Heterocyclic Ring Closure Reactions with Hydroxylamine”, Synthesis, Georg Thieme Verlag. Stuttgart, DE Jun. 1, 1991 pp. 483-486, XP000196317, ISSN: 0039-7881 the whole document.
I. I. Gerus et al., “Synthesis and Properties of beta-Ethoxyvinyl Polyfluoroalkyl Ketones”, Synthesis., No. 5, 2000, pp. 738-742, XP002295516, Georg Thieme Verlat. Stuttgart., DE the whole document.
P. P. Klemchuk, “Antioxidants: 4. Antioxidant Classes” Online!, Jun. 15, 2000, Wiley-VCH Verlag, XP 002303289, Retrieved from the Internet: URL:http://ww.mrw.interscience.Wiley.com/ueic/articles/a03—091/sect4-fs.html DOI: 10.1002/14356007.a03—091, the whole document.
International Search Report dated Nov. 12, 2004 based on International Application No. PCT/EP2004/005466.

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