Method for preparing conjugated diene phosphonate compounds
AssigneeRhodia Operations
InventorsZhaoqing Liu, Floryan De Campo
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Abstract
It is provided a method for preparing conjugated diene phosphonate compounds with high reactivity, which can be used to prepare a variety of phosphonate-bearing conjugated dienes. Some of those dienes will become reactive monomers to make polymers and co-polymers. The said method comprises the step of reacting α, β- or β, γ-unsaturated ketones or aldehydes with phosphorus acid or its derivates optionally in a mixture of acetic anhydride and/or acetic acid, to obtain a conjugated diene phosphonate compound having the formula (III)
Claims18
A method for preparing conjugated diene phosphonate compounds from α,β- or β,γ-unsaturated ketones or aldehydes, which comprises, reacting an α,β- or β,γ-unsaturated ketone or aldehyde having the formula I or II,
- with a phosphorus acid or its derivatives having the structure,
- to obtain a conjugated diene phosphonate compound having the formula III,
- wherein,
- R1, R2, R3, R4, and R5 represent, independently, hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, heterocycloalkyl, or alkenyl groups;
- R6 and R7 represent, independently, hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, alkenyl groups, or metals selected from the group consisting of Na, Li, and Ca;
- and
- said reaction is optionally carried out in a mixture of acetic anhydride and/or acetic acid.
Dependencies are inferred from the claim text.