β-ketophosphonates

Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus esters

Reexamination Certificate

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C568S015000

Reexamination Certificate

active

07112692

ABSTRACT:
A method for making β-ketophosphonates by reacting a trialkyl phosphonocarboxylate (such as triethyl phosphonoacetate) with an acyl halide (such as acetyl chloride) in a reaction involving ester formation, followed by decarboxylation, followed by purification. The reaction is run in a single solvent, which is not removed from the reaction mixture until the purification stage. Suitable solvents for this purpose include halogenated aromatic hydrocarbons (such as mono-chlorobenzene).

REFERENCES:
Kim et al.: J. Chem. Soc. Perkin Trans. 1, vol. 9, 1997, pp. 1361-1363, XP009000481.
Kim et al.: Synth. Commun., vol. 29, No. 8, 1999, pp. 1271-1275, XP001119775.
Corbel et al.: Synth. Commun., vol. 30, No. 4, 2000, pp. 609-618, XP001119776.

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