Process for the preparation of pyridine derivatives

Details Process for the preparation of pyridine derivatives Process for the preparation of pyridine derivatives

C - Chemistry, Metallurgy

07

F

C07F 9/40 (2006.01) C07C 321/08 (2006.01) C07D 213/64 (2006.01) C07D 213/71 (2006.01)

Patent

CA 2550693

Process for the preparation of substituted pyridine derivatives of formula (I) comprising reaction of a .alpha.-.beta.-unsaturated carbonyl compound of formula (II) R3-C(O)-C(R1)=C(R2)-G with a Wittig reagent or Horner-Wadsworth- Emmons reagent in the presence of a base and optionally subsequent cyclization.

L'invention concerne un procédé de préparation de dérivés de pyridine substitués représentés par la formule (I). Ce procédé consiste à faire réagir un composé carbonylé .alpha.,.beta.-insaturé de formule (II), R?3¿-C(O)-C(R?1¿)=C(R?2¿)-G, avec un réactif de Wittig ou un réactif de Horner-Wadsworth-Emmons en présence d'une base, et éventuellement, à poursuivre par une cyclisation.

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