Benzaldehyde oximes and method for producing same

A method for preparing a compound of formula (I)

• in which formula (I) includes both (E) and (Z) isomers, and wherein
• X2 is H, C1-C4 alkyl, C1-C4 fluoroalkyl, C1-C4 fluoroxyalkyl, C1-C4 alkoxy, fluorine, or CN;
• X3 is H, C1-C4 alkyl, C1-C4 fluoroalkyl, C1-C4 fluoroxyalkyl, C1-C4 alkoxy, fluorine, chlorine, or CN;
• X4 is H, C1-C4 alkyl, C1-C4 fluoroalkyl, C1-C4 fluoroxyalkyl, C1-C4 alkoxy, fluorine, or CN;
• X5 is H, C1-C4 alkyl, C1-C4 fluoroalkyl, C1-C4 fluoroxyalkyl, C1-C4 alkoxy, fluorine, chlorine, or CN;
• and
• X6 is H, C1-C4 alkyl, C1-C4 fluoroalkyl, C1-C4 fluoroxyalkyl, C1-C4 alkoxy, fluorine, or CN;
• and wherein the compounds of formula (II)
• in which the radicals are as defined above,
• are in a first reaction step reacted in the presence of isopropylmagnesium chloride and dimethylformamide (DMF) to form corresponding adducts of formula (III),
• which in a second reaction step with addition of acid and hydroxylamine react further to aldehydes of formula (IV)
• in which the radicals are as defined above,
• and undergoes continuous reaction to form the compounds of the formula (I).