Method for the production of phytofluene

Details Method for the production of phytofluene Method for the production of phytofluene

C - Chemistry, Metallurgy

07

C

C07C 1/00 (2006.01)

Patent

CA 2542052

The invention relates to a method for the production of phytofluene of formula I, where a) a phosphonium salt of formula II is condensed with an aldehyde of formula III to give an acetal of formula IV in a Wittig reaction, b) the condensation product of formula IV undergoes an acid-catalysed acetal hydrolysis to give the aldehyde of formula V and c) V is condensed with a phosphonium salt of formula VI to give phytofluene in a further Wittig reaction, whereby the groups R1, R2, R7, X- and Y- have the meanings given in the description.

L'invention concerne un procédé servant à produire du phytofluène de formule (I). Selon ce procédé, a) on condense en un acétal de formule (IV) un sel de phosphonium de formule (II) avec un aldéhyde de formule (III) dans une réaction de Wittig ; b) on soumet le produit de condensation de formule (IV) à une hydrolyse d'acétal à catalyse acide pour obtenir l'aldéhyde de formule (V) et c) on condense l'aldéhyde de formule (V) en phytofluène lors d'une autre réaction de Wittig avec un sel de phosphonium de formule (VI). Les restes R?1¿, R?2¿ et R?7¿ ainsi que X?-¿ et Y?-¿ ont la signification indiquée dans la description.

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