Reaction Steps
Further representatives of such compounds of formula I are the ethyl, n-propyl, n-butyl, n-hexyl n-octyl, sec.-butyl, 1-methylbutyl, neopentyl, isobutyl, isopentyl, 2-methylbutyl, 1,2-dimethylpropyl, tert.butyl, 1-ethylpropyl, allyl, 2-butenyl, 3-methyl-2-butenyl, 3-methyl-3-butenyl 1-ethyl-2-propenyl, 4-pentenyl, 1-methyl-2-butenyl, 1-methyl-3-butenyl, 3-butenyl, 2-methyl-2-propenyl, 3-butynyl, 2-butynyl, methoxymethyl, ethoxymethyl, n-propoxymethyl, isopropoxymethyl, n-pentyloxymethyl, 1-methoxyethyl, 2-methoxyethyl 2-ethoxyethyl, 2-isopropoxyethyl, 2-methoxy-1-methylethyl, 2-n-butyloxyethyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclopropylmethyl, 1-cyclopropylethyl, 3-tetrahydrofuryl, tetrahydrofurfuryl, 1,3-dioxan-5-yl, 1,3-dioxolan-5-ylmethyl, benzyl and 4-methoxyphenyl esters of 2-chloro-5-[3-difluoromethyl-3,6-dihydro-4-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-4-fluorobenzoic acid, isopropyl 2-chloro-5-[3-difluoromethyl-3,6-dihydro-4,5-dimethyl-2,6-dioxo-1(2H)-pyrimidinyl]-4-fluorobenzoate, isopropyl 2-chloro-5-[3-difluoromethyl-3,6-dihydro-5-fluoro-4-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-4-fluorobenzoate, isopropyl 2-chloro-5-[3-difluoromethyl-3,6-dihydro-4-methyl-2 6-dioxo-1(2H)-pyrimidinyl]-benzoate and isopropyl 2-chloro-5-[3,6-dihydro-4-methyl-3-(1,1,2,2-tetrafluoroethyl)-2,6-dioxo-1(2H)-pyrimidinyl]-4-fluorobenzoate.
