Anthelmintic pyrrolopyridazine compounds

A compound of Formula I:

• wherein:
• L is L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11, L12, L13, L14, L15, L16 or L17:
• R′ is hydrogen, optionally substituted alkyl, optionally substituted haloalkyl, optionally substituted cycloalkyl, optionally substituted aralkyl, optionally substituted aryl, or two R′ on the same L group together may form a 2- to 4-membered carbon chain to make a heterocycle;
• R1 is hydrogen, cyano, halogen, hydroxyl, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted alkoxy, optionally substituted alkenyloxy, optionally substituted alkynyloxy, optionally substituted alkoxyalkyl, optionally substituted aminoalkyl, optionally substituted alkylaminoalkyl, optionally substituted dialkylaminoalkyl, optionally substituted aryl, optionally substituted aryloxy, optionally substituted heteroaryl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted cycloalkoxy, optionally substituted heterocyclyl, optionally substituted alkylcarbonyl, optionally substituted alkoxycarbonyl, aminocarbonyl, optionally substituted alkylaminocarbonyl, optionally substituted dialkylaminocarbonyl, optionally substituted trialkylsilyl, optionally substituted trialkylsilyloxy, —SOp (optionally substituted alkyl or haloalkyl), —SF5, or —NRaRb, wherein Ra and Rb are independently H or optionally substituted alkyl;
• or Ra and Rb may form, with the nitrogen to which they are attached, a 3-, 4-, 5-, 6-, 7-, or 8-membered-heterocyclyl group, which may include one to three additional heteroatoms selected from the group consisting of N, O, Si and S and may be optionally substituted;
• R1′ is hydrogen, halogen, alkyl or haloalkyl;
• R2 is hydrogen, cyano, halogen, hydroxyl, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted alkoxyalkyl, optionally substituted aminoalkyl, optionally substituted alkylaminoalkyl, optionally substituted dialkylaminoalkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl;
• optionally substituted aryloxy, optionally substituted heteroaryl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted cycloalkoxy, optionally substituted heterocyclyl, optionally substituted alkylcarbonyl, optionally substituted alkoxycarbonyl, optionally substituted aminocarbonyl, optionally substituted alkylaminocarbonyl, optionally substituted dialkylaminocarbonyl, —SOp (optionally substituted alkyl or haloalkyl), —SF5, or —NRaRb, wherein Ra and Rb are independently H or optionally substituted alkyl;
• or Ra and Rb may form, with the nitrogen to which they are attached, a 3-, 4-, 5-, 6-, 7-, or 8-membered heterocyclyl group, which may include one to three additional heteroatoms selected from the group consisting of N, O, Si and S and may be optionally substituted;
• R3 is hydrogen, cyano, halogen, hydroxyl, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted alkoxyalkyl, optionally substituted aminoalkyl, optionally substituted alkylaminoalkyl, optionally substituted dialkylaminoalkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl;
• optionally substituted aryloxy, optionally substituted heteroaryl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted cycloalkoxy, optionally substituted heterocyclyl, optionally substituted alkylcarbonyl, optionally substituted alkoxycarbonyl, optionally substituted aminocarbonyl, optionally substituted alkylaminocarbonyl, optionally substituted dialkylaminocarbonyl, —SOp (optionally substituted alkyl or haloalkyl), —SF5, or —NRaRb, wherein Ra and Rb are independently H or optionally substituted alkyl;
• or Ra and Rb may form, with the nitrogen to which they are attached, a 3-, 4-, 5-, 6-, 7-, or 8-membered-heterocyclyl group, which may include one to three additional heteroatoms selected from the group consisting of N, O, Si and S and may be optionally substituted;
• R4 is hydrogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted alkylcarbonyl, optionally substituted alkoxycarbonyl, aminocarbonyl, optionally substituted alkylaminocarbonyl, optionally substituted dialkylaminocarbonyl, —S(O)p(optionally substituted alkyl), —SF5, optionally substituted heterocyclyl, optionally substituted aryl, optionally substituted 5- to 10-membered heteroaryl, a spirocyclic heterocyclyl-carbocyclyl group, a spirocyclic heterocyclyl-heterocyclyl group, a spirocyclic carbocyclyl-carbocyclyl group, a spirocyclic carbocyclyl-heterocyclyl group or —NRaRb, wherein Ra and Rb are independently H or optionally substituted alkyl;
• or Ra and Rb may form, with the nitrogen to which they are attached, a 3-, 4-, 5-, 6-, 7-, or 8-membered-heterocyclyl group, which may include one to three additional heteroatoms selected from the group consisting of N, O, Si and S and may be optionally substituted;
• R5 and R5′ are independently in each occurrence, hydrogen, halogen, cyano, nitro, hydroxyl, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted alkoxy, optionally substituted alkoxyalkyl, optionally substituted aminoalkyl, optionally substituted alkylaminoalkyl, optionally substituted dialkylaminoalkyl, optionally substituted cycloalkyl, optionally substituted cycloalkoxy, optionally substituted alkylcarbonyl, optionally substituted alkoxycarbonyl, optionally substituted aminocarbonyl, optionally substituted alkylaminocarbonyl, optionally substituted di(alkyl)aminocarbonyl, optionally substituted alkylcarbonyloxy, optionally substituted alkylcarbonylamino, optionally substituted aryl, optionally substituted heteroaryl, —SF5, —SOp (optionally substituted alkyl or haloalkyl);
• or R5 together with R5′ together form a 2-6-membered chain optionally containing one or two heteroatoms selected from the group consisting of N, O, Si and S to form carbocyclic or heterocyclic ring together with the carbon atom to which they are attached;
• or —NRcRd, wherein Rc and Rd are independently H or optionally substituted alkyl;
• or Rc and Rd may form, with the nitrogen to which they are attached, a 3-, 4-, 5-, 6-, 7-, or 8-membered-heterocyclyl group, which may include one to three additional heteroatoms selected from the group consisting of N, O, Si and S and may be optionally substituted;
• R9 is hydrogen, halogen, alkyl, haloalkyl, cycloalkyl, alkenyl or alkynyl;
• R6 and R7 are independently hydrogen, halogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted cycloalkyl, optionally substituted alkoxy, or optionally substituted cycloalkoxy, or R6 together with R7 form a 2-6-membered chain optionally containing one or two heteroatoms selected from the group consisting of N, O, Si and S to form carbocyclic or heterocyclic ring together with the carbon atom to which they are attached, wherein the carbon or nitrogen atoms in the chain may be optionally substituted;
• Q is C—R9 or N;
• X is O, S or N—R′;
• Y1 and Y6 are each independently N, C, or —CR5;
• Y2, Y3, Y4 and Y5 are each independently N, NR′, S, O, —CR5— or CR5R5′;
• W is CR6, CR6R7, O, SOp, N or N—R8, or W is absent;
• W1 is CR6, CR6R7, O, SOp, N or N—R8;
• Z is CR7, CR6R7, O, SOp, N or N—R8,
• R8 is hydrogen or C1-C4-alkyl;
• and
• wherein at most three of Y1, Y2, Y3, Y4, Y5 and Y6 are heteroatoms;
• q is 0 or 1;
• p is independently in each occurrence is 0, 1, or 2;
• and
• the dashed bonds () signifies a single or double bond;
• or a salt thereof;
• wherein “optionally substituted” indicates that the group recited may be optionally substituted with halogen, hydroxyl, oxo, alkyl, haloalkyl, cycloalkyl, cycloalkenyl, carboxyl, acyl, acyloxy, acetyl, alkylcarbonyl, haloalkylcarbonyl, alkoxycarbonyl, haloalkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, haloalkylaminocarbonyl, dihaloalkylaminocarbonyl, amino, alkyl- or dialkylamino, amido, arylamino, alkoxy, haloalkoxy, alkylthio, haloalkylthio, aryloxy, nitro, cyano, azido, thiol, thioamido, imino, amidino, guanidino, carbonate, silyl, silyl ether, SF5, R3Si— or R3SiO— where R is alkyl, haloalkyl or aryl, SF5, sulfate, alkylsulfonyl, haloalkylsulfonyl, sulfate, alkylsulfonyl, haloalkylsulfonyl, alkoxysulfonyl, alkylsulfinyl, haloalkylsulfinyl, sulfamoyl, sulfoximine, sulfinimine, sulfonimidamide, sulfonediimine, phosphonyl, phosphinyl, phosphoryl, phosphine, phosphonamidate, phosphinamidate, phosphinate, phosphine oxide, thioester, anhydride, oxime, hydrazine, carbamate, phosphate, phosphonate, aryl, heteroaryl or heterocyclyl.