3-formyl 4-methyl pentanoic acid substituted derivatives,...

C - Chemistry – Metallurgy – 07 – C

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260/520, 260/559

C07C 59/74 (2006.01) C07D 307/33 (2006.01) C07D 307/93 (2006.01)

Patent

CA 1183863

PRECIS DE LA DIVULGATION: L'invention concerne les composés de formule Image où Y est un reste aromatique, R2 et R3 représentent un alcoyle (1 à 4 carbones) ou, avec le carbone,forment un homocycle carboné (3 à 6 carbones), R est un alcoyle (1 à 6 carbones) ou les deux R forment une chaîne polyméthylène (2 ou 3 carbones), Z' est COOH ou Z, Z étant cyano ou CO2R1, où R1 est un alcoyle ( 1 à 6 carbones). L'invention concerne également la préparation des composés ci-dessus et leur application pour préparer l'acide 3-formyl 4-R2, R3, but-3-ène-l-oïque, intermédiaire dans la synthèse d'esters insecticides.

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