Method for producing 5-hydroxyalkyl-substituted 1-phenyl-1,2,4-triazole derivatives

A process comprising steps [C] reacting a compound of the general formula (XI),

• wherein R2 is (C1-C4)-alkyl,
• in a first step [C-1] in the presence of a base, with an acid chloride of the general formula (XII)
• wherein
• PG is a protecting group,
• and reacting the resultant intermediate in a second step [C-2] in the presence of a base, with a phenylhydrazine compound of the general formula (XIII)
• where R1A and R1B are independently selected from the group consisting of hydrogen, fluorine, chlorine, methyl, monofluoromethyl, difluoromethyl, trifluoromethyl, ethyl, methoxy, difluoromethoxy and trifluoromethoxy
• to produce a 1,2,4-triazolyl compound of the general formula (XIV)
• wherein PG is a protecting group, and R1A and R1B have the same definitions as for compound XIII,
• and reacting compound XIV in a third step [D] by detachment of the protecting group PG to produce a compound of the general formula (I)
• where R1A and R1B have the same definitions as for compound XIII.