Piperazines, pharmaceutical compositions and methods of use thereof
View Patent ↗Disclosed are novel piperazine derivatives that act as agonists of the α7 nAChR. Also disclosed are pharmaceutical compositions, methods of treating inflammatory conditions, methods of treating CNS disorders, methods for inhibiting cytokine release from mammalian cells and methods for the preparation of the novel compounds.
1. A compound of Formula (III) or a pharmaceutically acceptable salt thereof, wherein:
R 1 is selected from the group consisting of H, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, C4-C10 cycloalkenyl, C(═O)R 5 , C(═O)OR 5 and C(═O)NR 5 R 5 ;
V is selected from the group consisting of a bond, C(R 4 ) 2 , C(R 4 ) 2 C(R 4 ) 2 , C(R 4 ) 2 C(R 4 ) 2 R 6 , C(R 4 ) 2 C(R 4 ) 2 C(R 4 ) 2 R 6 , C(═O), C(═O)R 6 , C(═S), C(═S)R 6 , CH 2 C(═O), CH 2 C(═O)R 6 , CH 2 C(═S), CH 2 C(═S)R 6 , SO 2 , and SO 2 R 6 ;
A is a linking —C(R a ) 2 —X a —;
X a is selected from the group consisting of O, C(R 4 ) 2 O, OC(R 4 ) 2 , NR 5 , C(═O), C(R 4 ) 2 C(═O), C(═O)NR 5 , C(R 4 ) 2 NR 5 , NR 5 C(R 4 ) 2 , NR 5 C(═O), NR 5 C(═O)C(R 4 ) 2 , S, C(R 4 ) 2 S, and SC(R 4 ) 2 ;
when X a is C(R 4 ) 2 O, C(R 4 ) 2 NR 5 , C(═O), C(R 4 ) 2 C(═O), C(═O)NR 5 or C(R 4 ) 2 S, then each R a is independently selected from the group consisting of H, C1-C10 alkyl, C1-C10 alkyl substituted with one or more R 7 , C2-C10 alkenyl, C2-C10 alkenyl substituted with one or more R 7 , C2-C10 alkynyl, C2-C10 alkynyl substituted with one or more R 7 , C3-C10 cycloalkyl, C3-C10 cycloalkyl substituted with one or more R 8 , C4-C10 cycloalkenyl, C4-C10 cycloalkenyl substituted with one or more R 8 , halo, haloalkyl, OR 5 , SR 5 , NR 5 R 5 , C(═O)OR 5 , NO 2 , CN, C(═O)R 5 , C(═O)C(═O)R 5 , C(═O)NR 5 R 5 , N(R 5 )C(═O)R 5 , NR 5 S(═O) n R 5 , N(R 5 )C(═O)OR 5 , NR 5 C(═O)C(═O)R 5 , NR 5 C(═O)R 5 , NR 5 S(O) n NR 5 R 5 , NR 5 S(═O) n R 5 , S(═O) n R 5 , S(═O) n NR 5 R 5 and OC(═O)R 5 , or both R a are taken together to form a 3 to 6 membered ring containing 0 to 3 heteroatoms each independently selected from the group consisting of N, O and S, wherein said ring is substituted with one or more R 8 ; and,
when X a is O, OC(R 4 ) 2 , NR 5 , N 5 C(R 4 ) 2 NR 5 C(═O), NC(═O)R 5 C(R 4 ) 2 , S, or SC(R 4 ) 2 , then each R a is independently selected from the group consisting of H, C1-C10 alkyl, C1-C10 alkyl substituted with one or more R 7 , C2-C10 alkenyl, C2-C10 alkenyl substituted with one or more R 7 , C2-C10 alkynyl, C2-C10 alkynyl substituted with one or more R 7 , C3-C10 cycloalkyl, C3-C10 cycloalkyl substituted with one or more R 8 , C4-C10 cycloalkenyl, C4-C10 cycloalkenyl substituted with one or more R 8 , haloalkyl, C(═O)OR 5 , CN, C(═O)R 5 , C(═O)C(═O)R 5 and C(═O)NR 5 R 5 , or both R a are taken together to form a 3 to 6 membered ring containing 0 to 3 heteroatoms each independently selected from the group consisting of N, O and S, wherein said ring is substituted with one or more R 8 ;
each R 4 is independently selected from the group consisting of H, C1-C10 alkyl, C1-C10 alkyl substituted with one or more R 7 , C2-C10 alkenyl, C2-C10 alkenyl substituted with one or more R 7 , C2-C10 alkynyl, C2-C10 alkynyl substituted with one or more R 7 , C3-C10 cycloalkyl, C3-C10 cycloalkyl substituted with one or more R 8 , C4-C10 cycloalkenyl, C4-C10 cycloalkenyl substituted with one or more R 8 , halo, haloalkyl, OR 5 , SR 5 , NR 5 R 5 , C(═O)OR 5 , NO 2 , CN, C(═O)R 5 , C(═O)C(═O)R 5 , C(═O)NR 5 R 5 , N(R 5 )C(═O)R 5 , NR 5 S(═O) n R 5 , NR 5 C(═O)OR 5 , NR 5 C(═O)C(═O)R 5 , NR 5 C(═O)R 5 , NR 5 S(═O) n NR 5 R 5 , NR 5 S(═O) n R 5 , S(═O)R 5 , S(═O) n NR 5 R 5 and OC(═O)R 5 , or two R 4 are taken together to form a 3-6 membered ring comprising 0-3 heteroatoms, wherein said heteroatom is independently selected from the group consisting of N, O and S, and wherein said ring is substituted with one or more R 8 ;
each R 5 is independently selected from the group consisting of H, C1-C10 alkyl and C2-C10 alkenyl;
each R 6 is independently selected from the group consisting of C(R 4 ) 2 , C(R 4 ) 2 C(R 4 ) 2 , NR 5 , O, C(═O), C(═O)C(R4) 2 , C(═O)O, OC(R 4 ) 2 , C(R 4 ) 2 O, C(R 4 ) 2 S, C(R 4 ) 2 NR 5 , NR 5 CH 2 , S and SC(R 4 ) 2 ;
each R 7 is independently selected from the group consisting of halo, haloalkyl, OR 5 , SR 5 , C(═O)R 5 , OC(═O)R 5 , C(═O)OR 5 , NR 5 R 5 , NO 2 , CN, OC(═O)NR 5 R 5 , C(═O)NR 5 R 5 , N(R 5 )C(═O)R 5 , NR 5 C(═O)OR 5 , S(═O) n NR 5 R 5 , C3-C8 cycloalkyl, C4-C10 cycloalkenyl, 3-8 membered heterocycloalkyl, 4-10 membered heterocycloalkenyl, C5-C11 bicycloalkyl, C5-C11 bicycloalkenyl, 5-11 membered heterobicycloalkyl, 5-11 membered heterobicycloalkenyl, aryl, and heteroaryl, wherein said aryl and heteroaryl are each optionally substituted with one or more R 9 ;
each R 8 is independently selected from the group consisting of R 7 , C1-C10 alkyl, C1-C10 alkyl substituted with one or more R 7 , C2-C10 alkenyl, C2-C10 alkenyl substituted with one or more R 7 , C2-C10 alkynyl, and C2-C10 alkynyl substituted with one or more R 7 ;
each R 9 is independently selected from the group consisting of C1-C10 alkyl, C1-C10 alkyl substituted with one or more R 7 , C2-C10 alkenyl, C2-C10 alkenyl substituted with one or more R 7 , C2-C10 alkynyl, C2-C10 alkynyl substituted with one or more R 7 , C3-C10 cycloalkyl, C3-C10 cycloalkyl substituted with one or more R 8 , C4-C10 cycloalkenyl, C4-C10 cycloalkenyl substituted with one or more R 8 , 3-8 membered heterocycloalkyl, 3-8 membered eterocycloalkyl substituted with one or more R 8 , 4-10 membered heterocycloalkenyl, 4-10 membered heterocycloalkenyl substituted with one or more R 8 , C5-C11 bicycloalkyl, C5-C11 bicycloalkyl substituted with one or more R 8 , C5-C11 bicycloalkenyl, C5-C11 bicycloalkenyl substituted with one or more R 8 , 5-11 membered heterobicycloalkyl, 5-11 membered heterobicycloalkyl substituted with one or more R 8 , 5-11 membered heterobicycloalkenyl, 5-11 membered heterobicycloalkenyl substituted with one or more R 8 , halo, OR 5 , SR 5 , NR 5 R 5 , C(═O)OR 5 , NO 2 , CN, C(═O)R 5 , C(═O)C(═O)R 5 , C(═O)NR 5 R 5 , NR 5 C(═O)R 5 , NR 5 S(═O) n R 5 , NR 5 C(═O)OR 5 , NR 5 C(═O)C(═O)R 5 , NR 5 C(═O)NR 5 R 5 , NR 5 S(═O) n NR 5 R 5 , NR 5 S(═O) n R 5 , S(═O) n R 5 , S(═O) n NR 5 R 5 , OC(═O)R 5 , optionally substituted aryl, and optionally substituted heteroaryl;
R 12 is selected from the group consisting of:
wherein in R 12 :
(a) W is selected from the group consisting of NR 5 , O and S;
(b) each m is an integer from 0 to 3;
(c) each p is an integer from 0 to 5;
(d) each q is an integer from 0 to 4;
(e) each t is an integer from 0 to 2; and
(f) each R 9 is independently selected from the group consisting of C1-C10 alkyl, C1-C10 alkyl substituted with one or more R 7 , halo, OR 5 , NR 5 R 5 , C(═O)OR 5 , NO 2 , CN, S(═O) n R 5 optionally substituted aryl and optionally substituted heteroaryl; and
each R 13 independently selected from the group consisting of C1-C10 alkyl, C1-C10 alkyl substituted with one or more R 7 , C2-C10 alkenyl, C2-C10 alkenyl substituted with one or more R 7 , C2-C10 alkynyl, C2-C10 alkynyl substituted with one or more R 7 , C3-C10 cycloalkyl, C3-C10 cycloalkyl substituted with one or more R 8 , C4-C10 cycloalkenyl, C4-C10 cycloalkenyl substituted with one or more R 8 , 3-8 membered heterocycloalkyl, 3-8 membered heterocycloalkyl substituted with one or more R 8 , 4-10 membered heterocycloalkenyl, 4-10 membered heterocycloalkenyl substituted with one or more R 8 , C5-C11 bicycloalkyl, C5-C11 bicycloalkyl substituted with one or more R 8 , C5-C11 bicycloalkenyl, C5-C11 bicycloalkenyl substituted with one or more R 8 , 5-11 membered heterobicycloalkyl, 5-11 membered heterobicycloalkyl substituted with one or more R 8 , 5-11 membered heterobicycloalkenyl, 5-11 membered heterobicycloalkenyl, 5-11 membered heterobicycloalkenyl substituted with one or more R 8 , halo, OR 5 , SR 5 , NR 5 R 5 , C(═O)OR 5 , NO 2 , CN, C(═O)R 5 , C(═O)C(═O)R 5 , C(═O)NR 5 R 5 , NR 5 C(═O)R 5 , NR 5 S(═O) n R 5 , NR 5 C(═O)OR 5 , NR 5 C(═O)C(═O)R 5 , NR 5 C(═O)NR 5 R 5 , NR 5 S(═O) n NR 5 R 5 , NR 5 S(═O) n R 5 , S(═O) n R 5 , S(═O) n NR 5 R 5 , OC(═O)R 5 , optionally substituted aryl and optionally substituted heteroaryl;
n is 1 or 2; and
q is an integer from 0 to 4.
2. A pharmaceutical composition comprising at least one pharmaceutically acceptable carrier and the compound of claim 1 .