Process for the preparation of azoxystrobin and analogues...

Details Process for the preparation of azoxystrobin and analogues... Process for the preparation of azoxystrobin and analogues...

C - Chemistry, Metallurgy

07

D

C07D 239/52 (2006.01)

Patent

CA 2445755

A process for the preparation of a compound of the general formula (I): wherein R1 is a 4-pyrimidinyl ring substituted at the 6-position by halo, hydroxy, 2-cyanophenoxy, 2,6-difluorophenoxy, 2-nitrophenoxy or 2- thiocarboxamidophenoxy and R2 is any group which can be transesterified to form a methyl ester, which comprises treating a compound of general formula (II): wherein R1 and R2 have the meanings given above, with a formylating agent and subsequently treating the formylated product with a methylating agent.

Cette invention concerne un procédé de préparation d'un composé représenté par la formule générale (I):dans laquelle R?1¿ est un noyau de 4-pyrimidinyle substitué en position 6 par halo, hydroxy, 2-cyanophénoxy, 2,6-difluorophénoxy, 2-nitrophénoxy ou 2-thiocarboxamidophénoxy et R?2¿ est n'importe quel groupe qui peut être transestérifié pour former un ester de méthyle, ce qui consiste à traiter un composé représenté par la formule (II), dans laquelle R?1¿ et R?2¿ ont la signification susmentionnée, avec un agent de formylation et traiter ensuite le produit formylhaté avec un agent de méthylation.

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