Task: Translation
Input (Czech): Popisuje se zp sob v²roby herbicidu ethyl-.alfa.-2-dichlor-5-[4-(difluormethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorbenzenpropano tu sou asnou diazotac  4-difluormethyl-4,5-dihydro-3-methyl-5-oxo-1-(5-amino-2-fluoro-4-chlorfenyl)-1H-1,2,4-triazolu, d le jen amin, a arylac  ethylakryl tu diazotovan²m aminem. Zp sob spo  v  v tom,  e se p°id vaj  v dan m po°ad  a za specifick²ch podm nek ke chlazen mu m chan mu roztoku aminu v acetonu n sleduj c  l tky: chlorid m  n², kyselina chlorovod kov , ethylakryl t a dusitan sodn².\
Output (English): In the present invention there is disclosed a process for the preparation of the herbicide ethyl-{alpha}-2-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropionate by the simultaneous diazotization of 4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1-(5-amino-2-fluoro-4-chloro-phenyl)-1H-1,2,4-triazole (the Amine) and arylation of ethyl acrylate with the diazotized Amine. In the process, the following reagents are added in sequence and, under specified conditions, to a cooled, stirred solution of the Amine in acetone: cuprous chloride, hydrochloric acid, ethyl acrylate, and sodium nitrite.