Patent ID: 8895775

Claim:
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, R 1 , R 2 , R 3 , R 4 , and R 5 represent, independently, hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, heterocycloalkyl, or alkenyl groups; R 6 and R 7 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.