S-imino-S-oxo-iminothiadiazine compounds as BACE inhibitors, compositions, and their use

A compound, or a pharmaceutically acceptable salt of said compound, said compound having the structural Formula (I):

• or a tautomer thereof having the structural Formula (I′):
• or pharmaceutically acceptable salt thereof, wherein:
• RN is selected from the group consisting of alkyl, haloalkyl, and heteroalkyl, wherein said heteroalkyl is optionally substituted with halogen;
• R1 is selected from the group consisting of H, alkyl, heteroalkyl, cycloalkyl, and -alkyl-cycloalkyl, wherein each said alkyl, heteroalkyl, cycloalkyl, and -alkyl-cycloalkyl, is optionally substituted with one or more halogen;
• R2 is selected from the group consisting of H, halogen, alkyl, heteroalkyl, cycloalkyl, and -alkyl-cycloalkyl, wherein each said alkyl, heteroalkyl, cycloalkyl, and -alkyl-cycloalkyl is optionally substituted with one or more halogen;
• R3 is selected from the group consisting of H, halogen, alkyl, heteroalkyl, cycloalkyl, and -alkyl-cycloalkyl, wherein each said alkyl, heteroalkyl, cycloalkyl, and -alkyl-cycloalkyl is optionally substituted with one or more halogen;
• R4 is selected from the group consisting of H, alkyl, heteroalkyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl, wherein each said alkyl, heteroalkyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl is optionally substituted with one or more halogen;
• ring A is selected from the group consisting of aryl, monocyclic heteroaryl, and a multicyclic group;
• m is 0 or more;
• each RA (when present) is independently selected from the group consisting of:
• halogen, oxo, —OH, —CN, —SF5, —OSF5, —Si(R5A)3, —N(R6A)2, —OR6A, —SR6A, alkyl, heteroalkyl, alkenyl, alkynyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl,
• wherein said alkyl, heteroalkyl, alkenyl, alkynyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl of RA are each optionally independently unsubstituted or substituted with one or more groups independently selected from R8;
• -L1- is a divalent moiety selected from the group consisting of —NHC(O)— and —C(O)NH—;
• RL is selected from the group consisting of alkyl and heteroalkyl, wherein said alkyl and heteroalkyl of RL are each optionally unsubstituted or substituted with one or more halogen;
• or, alternatively, RL is a moiety having the formula
• wherein q is 0 or 1;
• -LB- (when present) is a divalent moiety selected from the group consisting of lower alkyl and lower heteroalkyl, wherein each said lower alkyl and lower heteroalkyl is optionally substituted with one or more halogen;
• ring B is selected from the group consisting of aryl, monocyclic heteroaryl, monocyclic cycloalkyl, monocyclic cycloalkenyl, monocyclic heterocycloalkyl, monocyclic heterocycloalkenyl, and a multicyclic group;
• p is 0 or more;
• and
• each RB (when present) is independently selected from the group consisting of:
• halogen, oxo, —OH, —CN, —SF5, —OSF5, —Si(R5B)3, —N(R6B)2, —NR7BC(O)R6B, —NR7BS(O)R6B, —NR7BS(O)2N(R6B)2, —NR7BC(O)N(R6B)2, —NR7BC(O)OR6B, —C(O)R6B, —C(O)OR6B, —C(O)N(R6B)2, —S(O)R6B, —S(O)2R6B, —S(O)2N(R6B)2, —OR6B, —SR6B, alkyl, heteroalkyl, alkenyl, alkynyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, -alkyl-heterocycloalkyl, aryl, -alkyl-aryl, heteroaryl, and -alkyl-heteroaryl,
• wherein said alkyl, heteroalkyl, alkenyl, alkynyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, -alkyl-heterocycloalkyl, aryl, -alkyl-aryl, heteroaryl, and -alkyl-heteroaryl, of RB are each optionally independently unsubstituted or substituted with one or more groups independently selected from R9;
• each R5A and R5B (when present) is independently selected from the group consisting of alkyl, heteroalkyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl,
• wherein each said alkyl, heteroalkyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl of R5A and R5B is unsubstituted or substituted with one or more halogen;
• each R6A (when present) is independently selected from the group consisting of H, alkyl, -alkyl-OH, alkenyl, alkynyl, heteroalkyl, -heteroalkyl-OH, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl
• wherein each said alkyl, -alkyl-OH, alkenyl, alkynyl, heteroalkyl, -heteroalkyl-OH, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, -alkyl-heterocycloalkyl, aryl, -alkyl-aryl, heteroaryl, and -alkyl-heteroaryl of R6A is unsubstituted or substituted with one or more groups independently selected from halogen, alkyl, cycloalkyl, heteroalkyl, haloalkyl, alkoxy, heteroalkoxy, and haloalkoxy;
• each R6B (when present) is independently selected from the group consisting of H, alkyl, -alkyl-OH, alkenyl, alkynyl, heteroalkyl, -heteroalkyl-OH, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, -alkyl-heterocycloalkyl, aryl, -alkyl-aryl, heteroaryl, and -alkyl-heteroaryl,
• wherein each said alkyl, -alkyl-OH, alkenyl, alkynyl, heteroalkyl, -heteroalkyl-OH, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, -alkyl-heterocycloalkyl, aryl, -alkyl-aryl, heteroaryl, and -alkyl-heteroaryl of R6B is unsubstituted or substituted with one or more groups independently selected from halogen, alkyl, cycloalkyl, heteroalkyl, haloalkyl, alkoxy, heteroalkoxy, and haloalkoxy;
• each R7B (when present) is independently selected from the group consisting of H, alkyl, heteroalkyl, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl,
• wherein each said alkyl, heteroalkyl, -heteroalkyl-OH, cycloalkyl, -alkyl-cycloalkyl, heterocycloalkyl, and -alkyl-heterocycloalkyl of R7B is unsubstituted or substituted with one or more halogen;
• each R8 (when present) is independently selected from the group consisting of halogen, lower alkyl, lower heteroalkyl, lower alkoxy, lower cycloalkyl, and lower heterocycloalkyl, wherein each said lower alkyl, lower heteroalkyl, lower alkoxy, lower cycloalkyl, and lower heterocycloalkyl of R8 is optionally substituted with halogen;
• and
• each R9 (when present) is independently selected from the group consisting of halogen, —OH, —CN, —SF5, —OSF5, alkyl, -alkyl-OH, heteroalkyl, -heteroalkyl-OH, alkoxy, —O-heteroalkyl, cycloalkyl, -alkyl-cycloalkyl, —O-cycloalkyl, —O-alkyl-cycloalkyl, -heterocycloalkyl, -alkyl-heterocycloalkyl, —O-heterocycloalkyl and —O-alkyl-heterocycloalkyl, wherein each said alkyl, -alkyl-OH, heteroalkyl, -heteroalkyl-OH, alkoxy, —O-heteroalkyl, cycloalkyl, -alkyl-cycloalkyl, —O-cycloalkyl, —O-alkyl-cycloalkyl, -heterocycloalkyl, -alkyl-het erocycloalkyl, —O-heterocycloalkyl and —O-alkyl-heterocycloalkyl are optionally substituted with one or more halogen.