A process for preparing a compound of Formula 1 wherein R 1 is H, C 1 -C 7 alkyl, C 3 -C 8 alkoxycarbonylalkyl, C 4 -C 7 alkylcycloalkyl, C 3 -C 7 alkenyl, C 3 -C 7 alkynyl, C 3 -C 7 cycloalkyl, C 4 -C 7 cycloalkylalkyl, C 2 -C 3 cyanoalkyl, C 1 -C 4 nitroalkyl, C 1 -C 7 haloalkyl, C 3 -C 7 haloalkenyl, C 2 -C 7 alkoxyalkyl or C 3 -C 7 alkylthioalkyl; R 2 is C 1 -C 7 alkyl, C 3 -C 8 alkylcarbonylalkyl, C 3 -C 8 alkoxycarbonylalkyl, C 4 -C 7 alkylcycloalkyl, C 3 -C 7 alkenyl, C 3 -C 7 alkynyl, C 3 -C 7 cycloalkyl, C 4 -C 7 cycloalkylalkyl, C 2 -C 3 cyanoalkyl, C 1 -C 4 nitroalkyl, C 2 -C 7 haloalkoxyalkyl, C 1 -C 7 haloalkyl, C 3 -C 7 haloalkenyl, C 2 -C 7 alkoxyalkyl or C 2 -C 3 alkoxycarbonyl; or phenyl optionally substituted by halogen, C 1 -C 4 alkyl or C 1 -C 4 haloalkyl; X is O or S; or X is -C(R 6)=C(R 7)-, wherein the carbon atom bonded to R 6 is also bonded to the carbon atom bonded to R 4, and the carbon atom bonded to R 7 is also bonded to the phenyl ring moiety in Formula 1; each R 3 is independently halogen, -CN, nitro, C 1 -C 5 alkyl, C 2 -C 5 alkenyl, C 2 -C 5 alkynyl, C 3 -C 5 cycloalkyl, C 4 -C 5 cycloalkylalkyl, C 1 -C 5 haloalkyl, C 3 -C 5 haloalkenyl, C 3 -C 5 haloalkynyl, C 2 -C 5 alkoxyalkyl, C 1 -C 5 alkoxy, C 1 -C 5 haloalkoxy, C 1 -C 5 alkylthio, C 1 -C 5 haloalkylthio or C 2 -C 5 alkoxycarbonyl; n is 0, 1, 2 or 3; and R 4, R 6 and R 7 are independently H, halogen, nitro, -CN, C 1 -C 5 alkyl, C 2 -C 5 alkenyl, C 2 -C 5 alkynyl, C 3 -C 5 cycloalkyl, C 4 -C 5 cycloalkylalkyl, C 1 -C 5 haloalkyl, C 3 -C 5 haloalkenyl, C 3 -C 5 haloalkynyl, C 2 -C 5 alkoxyalkyl, C 1 -C 5 alkoxy, C 1 -C 5 haloalkoxy, C 1 -C 5 alkylthio, C 1 -C 4 alkylsulfinyl, C 1 -C 4 alkylsulfonyl, C 1 -C 5 haloalkylthio or C 2 -C 5 alkoxycarbonyl; comprising hydrolyzing a compound of Formula 2 wherein R 1, R 2, R 3, n, R 4, X, R 6 and R 7 are defined for Formula 1 above; and Pyr is a pyridine ring optionally substituted with halogen or C 1 -C 4 alkyl. R 1 is H, C 1 -C 7 alkyl, C 3 -C 8 alkoxycarbonylalkyl, C 4 -C 7 alkylcycloalkyl, C 3 -C 7 alkenyl, C 3 -C 7 alkynyl, C 3 -C 7 cycloalkyl, C 4 -C 7 cycloalkylalkyl, C 2 -C 3 cyanoalkyl, C 1 -C 4 nitroalkyl, C 1 -C 7 haloalkyl, C 3 -C 7 haloalkenyl, C 2 -C 7 alkoxyalkyl or C 3 -C 7 alkylthioalkyl; R 2 is C 1 -C 7 alkyl, C 3 -C 8 alkylcarbonylalkyl, C 3 -C 8 alkoxycarbonylalkyl, C 4 -C 7 alkylcycloalkyl, C 3 -C 7 alkenyl, C 3 -C 7 alkynyl, C 3 -C 7 cycloalkyl, C 4 -C 7 cycloalkylalkyl, C 2 -C 3 cyanoalkyl, C 1 -C 4 nitroalkyl, C 2 -C 7 haloalkoxyalkyl, C 1 -C 7 haloalkyl, C 3 -C 7 haloalkenyl, C 2 -C 7 alkoxyalkyl or C 2 -C 3 alkoxycarbonyl; or phenyl optionally substituted by halogen, C 1 -C 4 alkyl or C 1 -C 4 haloalkyl; X is O or S; or X is -C(R 6)=C(R 7)-, wherein the carbon atom bonded to R 6 is also bonded to the carbon atom bonded to R 4, and the carbon atom bonded to R 7 is also bonded to the phenyl ring moiety in Formula 1; each R 3 is independently halogen, -CN, nitro, C 1 -C 5 alkyl, C 2 -C 5 alkenyl, C 2 -C 5 alkynyl, C 3 -C 5 cycloalkyl, C 4 -C 5 cycloalkylalkyl, C 1 -C 5 haloalkyl, C 3 -C 5 haloalkenyl, C 3 -C 5 haloalkynyl, C 2 -C 5 alkoxyalkyl, C 1 -C 5 alkoxy, C 1 -C 5 haloalkoxy, C 1 -C 5 alkylthio, C 1 -C 5 haloalkylthio or C 2 -C 5 alkoxycarbonyl; n is 0, 1, 2 or 3; and R 4, R 6 and R 7 are independently H, halogen, nitro, -CN, C 1 -C 5 alkyl, C 2 -C 5 alkenyl, C 2 -C 5 alkynyl, C 3 -C 5 cycloalkyl, C 4 -C 5 cycloalkylalkyl, C 1 -C 5 haloalkyl, C 3 -C 5 haloalkenyl, C 3 -C 5 haloalkynyl, C 2 -C 5 alkoxyalkyl, C 1 -C 5 alkoxy, C 1 -C 5 haloalkoxy, C 1 -C 5 alkylthio, C 1 -C 4 alkylsulfinyl, C 1 -C 4 alkylsulfonyl, C 1 -C 5 haloalkylthio or C 2 -C 5 alkoxycarbonyl; R 1, R 2, R 3, n, R 4, X, R 6 and R 7 are defined for Formula 1 above; and Pyr is a pyridine ring optionally substituted with halogen or C 1 -C 4 alkyl.