A novel process for preparing crystalline methyl N-2-1-(4-chlorophenyl)-1H-pyrazol-3-yloxymethylphenyl-N -methoxycarbamate.

摘要

The present invention relates to a process for preparing crystalline methyl N-[2-[[[1-(4-chlorophenyl)-1H-pyrazol-3-yl]oxy]methyl]phenyl]-N -methoxycarbamate (I), comprising a) reacting a compound of formula (II) with an alkylating agent in the presence of a base in the presence of a polar solvent selected from alcohols and ketons; b) the addition of water.