Process and intermediates for the preparation of certain nematicidal sulfonamides

The present invention provides a method for preparing a compound of Formula C, Formula D, or Formula F:wherein each R1, R2, and R3 is independently H, SF5, N(C1-C8 alkyl)(C1-C8 alkyl), C(═S)N(C1-C8 alkyl)(C1-C8 alkyl), SO2N(C1-C8 alkyl)(C1-C8 alkyl), OSO2(C1-C8 alkyl), OSO2N(C1-C8 alkyl)(C1-C8 alkyl), N(C1-C8 alkyl)SO2(C1-C8 alkyl), or C1-C8 alkyl, C1-C8 haloalkyl, C2-C8 alkenyl, C2-C8 alkynyl, C3-C10 cycloalkyl, C3-C10 halocycloalkyl, C4-C10 alkylcycloalkyl, C4-C10 cycloalkylalkyl, C6-C14 cycloalkylcycloalkyl, C5-C10 alkylcycloalkylalkyl, C3-C8 cycloalkenyl, C1-C8 alkoxy, C1-C8 haloalkoxy, C3-C8 cycloalkoxy, C3-C8 halocycloalkoxy, C4-C10 cycloalkylalkoxy, C2-C8 alkenyloxy, C2-C8 alkynyloxy, C1-C8 alkylthio, C1-C8 alkylsulfinyl, C1-C8 alkylsulfonyl, C3-C8 cycloalkylthio, C3-C8 cycloalkylsulfinyl, C3-C8 cycloalkylsulfonyl, C4-C10 cycloalkylalkylthio, C4-C10 cycloalkylalkylsulfinyl, C4-C10 cycloalkylalkylsulfonyl, C2-C8 alkenylthio, C2-C8 alkenylsulfinyl, C2-C8 alkenylsulfonyl, C2-C8 alkynylthio, C2-C8 alkynylsulfinyl, C2-C8 alkynylsulfonyl, or phenyl; ortwo of R1, R2, and R3 on adjacent ring atoms may be taken together to form a 5- to 7-membered carbocyclic or heterocyclic ring, each ring containing ring members selected from carbon atoms and up to 3 heteroatoms independently selected from up to 2 O, up to 2 S, and up to 3 N, wherein up to 2 carbon atom ring members are independently selected from C(═O) and C(═S) and such ring is optionally substituted with up to 3 substituents independently selected from the group consisting of C1-C4 alkyl, C1-C4 haloalkyl, C2-C4 alkenyl, C2-C4 haloalkenyl, C2-C4 alkynyl, C2-C4 haloalkynyl, C3-C7 cycloalkyl, C3-C7 halocycloalkyl, C4-C8 alkylcycloalkyl, C4-C8 haloalkylcycloalkyl, C4-C8 cycloalkylalkyl, C4-C8 halocycloalkylalkyl, C1-C8 alkoxy, C1-C8 haloalkoxy, C2-C8 alkoxycarbonyl, C2-C6 haloalkoxycarbonyl, C2-C6 alkylcarbonyl and C2-C6 haloalkylcarbonyl; andM is an inorganic cation or organic cation.