Process for preparing diketone compounds

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 323/22 (2006.01) C07C 201/12 (2006.01) C07C 205/11 (2006.01) C07C 205/45 (2006.01) C07C 319/20 (2006.01)

Patent

CA 2242532

The invention relates to a process for preparing compounds of formula (I), wherein R2 is lower alkyl; or phenyl optionally substituted by from one to five groups which may be the same or different selected from lower alkyl, lower haloalkyl, halogen and -SR4; R3 is halogen, lower alkyl, lower haloalkyl, lower alkoxy, lower haloalkoxy, -S-alkyl, cycloalkyl having from 3 to 7 carbon atoms in the ring, alkenyl or alkynyl having from 3 to 7 carbon atoms, or -(CR5R6)q-SR2 wherein q is one or two; R4 is lower alkyl; R5 and R6 independently represent hydrogen, lower alkyl or lower haloalkyl; and n is zero or an integer from one to three; to intermediate compounds used in preparing compounds of formula (II), and processes for preparing such compounds.

Cette invention se rapporte à un procédé de préparation de composés représentés par la formule générale (I), à des composés intermédiaires servant à préparer des composés représentés par la formule (II) ainsi qu'à des procédés de préparation de ces composés. Dans la formule (I), R¿2? est alkyle inférieur, ou phényle éventuellement substitué par un à cinq groupes qui peuvent être identiques ou différents, sélectionnés parmi un alkyle inférieur, un haloalkyle inférieur, un halogène et -SR¿4?, R¿3? est halogène, alkyle inférieur, haloalkyle inférieur, alkoxy inférieur, haloalkoxy iférieur, -S-alkyle, cycloalkyle ayant de 3 à 7 atomes de carbone sur le noyau, alkényle ou alkynyle ayant de 3 à 7 atomes de carbone, ou -(CR¿5?R¿6?)¿q?-SR¿2? où q est égal à 1 ou 2, R¿4? est alkyle inférieur, R¿5? et R¿6? sont indépendamment hydrogène, alkyle inférieur ou haloalkyle inférieur, et n est égal à 0 ou à un entier compris entre 1 et 3.

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