Preparation of o-(2-hydroxyalkyl) oximes

Details Preparation of o-(2-hydroxyalkyl) oximes Preparation of o-(2-hydroxyalkyl) oximes

C - Chemistry, Metallurgy

07

C

C07C 249/12 (2006.01) C07C 251/54 (2006.01)

Patent

CA 2196452

Preparation of O-(2-hydroxyalkyl) oximes of formula (I), (R1 and R2 are alkyl or R1 and R2 and the common C atom are 5-membered to 7-membered cycloalkyl; R3 is alkyl) by causing a ketoxime II to react with an olefin oxide III in the presence of a tertiary amine or with a carbonate IV in the presence of a catalyst. The end products (I) are suitable for use as intermediates for crop protection agents.

Préparation de O-(2-hydroxyalkyle) oximes de formule (I), dans laquelle R?1¿ et R?2¿ sont alkyle ou R?1¿ et R?2¿ et l'atome C commun sont cycloalkyle ayant de 5 à 7 éléments et R?3¿ est alkyle. Ladite préparation consiste à faire réagir un cétoxime II avec un oxyde III d'oléfine en présence d'une amine tertiaire ou avec un carbonate IV en présence d'un catalyseur. Les produits finaux sont destinés à être utilisés en tant qu'intermédiaires pour des agents de protection des cultures.

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