| 主权项 |
1. A process for preparing a 3,5-bis(haloalkyl)pyrazole of formula (Ia) and (Ib) in which R1 and R3 are each independently selected from C1-C6-haloalkyl; R2 is selected from H, Hal, COOH, (C═O)OR4, CN and (C═O)NR4R5; R4 and R5 are each independently selected from C1-12-alkyl, C3-8-cycloalkyl, C6-18-aryl, C7-19-arylalkyl and C7-19-alkylaryl, or R4 and R5 together with the nitrogen atom to which they are bonded may form a four-, five- or six-membered ring; comprising in (A), reacting one or more α,α-dihaloamines of the formula (II), in which X is independently selected from F, Cl or Br; R5 and R6 are each independently selected from C1-12-alkyl, C3-8-cycloalkyl, C6-18-aryl, C7-19-arylalkyl and C7-19-alkylaryl or where R5 and R6 together with the nitrogen atom to which they are bonded may form a five- or six-membered ring; R1 is as defined above; with one or more compounds of formula (III), in which R2 and R3 are as defined above; to form the compound of formula (IV) or (V) and in (B) in the presence of an acid and hydrazine cyclization of (IV) or (V) takes place to form (la/Ib). |
