Preparation of phosphonic esters

Details Preparation of phosphonic esters Preparation of phosphonic esters

C - Chemistry, Metallurgy

07

F

C07F 9/40 (2006.01) C07F 9/655 (2006.01)

Patent

CA 2154627

Phosphonic esters I Image I (A is an aromatic radical or an .alpha.,.beta.-olefinically unsaturated group and R1 is C1-C4-alkyl or phenyl) are prepared by subjecting a phosphite II Image II to a rearrangement reaction in the presence of a catalytic amount of a halide ion-donating compound (III) to give I. The compounds I are used as intermediates for organic syntheses, in particular for the synthesis of polyenes.

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