Cinnoline Compounds for the Treatment of Anxiety, Cognitive and Mood Disorders

Abstract

This invention relates to novel compounds having the structural formula I below: and their pharmaceutically acceptable salts, tautomers or in vivo-hydrolysable precursors, compositions and methods of use thereof. These novel compounds provide a treatment or prophylaxis of anxiety disorders, cognitive disorders, and/or mood disorders.

1 . A compound of Formula I; a tautomer or atropisomer thereof; or a pharmaceutically acceptable salt of the compound, tautomer or atropisomer, wherein:
 Formula I corresponds to:   
       
         
           
           
               
               
           
         
         R 1  is C 1-6 alkyl, C 1-6 haloalkyl, aryl, heteroaryl, cycloalkyl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl; 
         R 2  is H; 
         R 3 , R 4  and R 5  are each, independently, H, C 1-4 alkoxy, or halo; 
         R 6  is heteroaryl substituted by 1, 2, 3, 4 or 5 A 1 ; 
         A 1  is halo, CN, NO 2 , OR a , SR a , C(═O)R b , C(═O)NR c R d , C(═O)OR a , OC(═O)R b , OC(═O)NR b R d , NR c R d , NR b C(═O)R d , NR b C(═O)OR a , NR c S(═O)R b , NR c S(═O) 2 R b , S(═O)R b , S(═O)NR c R d , S(═O) 2 R b , S(═O) 2 NR c R d , C 1-4 alkoxy, C 1-4 haloalkoxy, amino, C 1-4 alkylamino, C 2-8 dialkylamino, C 2-6 alkenyl, C 2-6 alkynyl, arylalkyl, cycloalkylalkyl, heteroarylalkyl, heterocycloalkylalkyl, aryl, cycloalkyl, heteroaryl or heterocycloalkyl, wherein:
 each of the C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, arylalkyl, cycloalkylalkyl, heteroarylalkyl, aryl, cycloalkyl, heterocycloalkylalkyl, heteroaryl or heterocycloalkyl is optionally substituted by 1, 2, 3, 4 or 5 substituents independently selected from halo, C 1-6 allyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-4 haloalkyl, aryl, cycloalkyl, heteroaryl, heterocycloalkyl, CN, NO 2 , OR a′ , SR a′ , C(═O)R b′ , C(═O)NR c′ R d′ , C(═O)OR a′ , OC(═O)R b′ , OC(═O)NR c′ R d′ , NR c′ C(═O)R b′ , NR c′ C(═O)OR a′ , NR b′ S(═O)R b′ , NR c′ S(═O) 2 R b′ , S(═O)R b′ , S(═O)NR c′ R d′ , S(═O) 2 R b′ , or S(═O) 2 NR c′R   d′ ; 
 
         R a  and R a′  are each, independently, H, C 1-6 alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, cycloalkyl, heteroaryl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl, wherein:
 the C 1-6 alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, cycloalkyl, heteroaryl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl is optionally substituted with OH, amino, halo, C 1-6 alkyl, C 1-6 haloalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, cycloalkyl or heterocycloalkyl; 
 
         R b  and R b′  are each, independently, H, C 1-6 alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, cycloalkyl, heteroaryl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl, wherein:
 the C 1-6 alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, cycloalkyl, heteroaryl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl is optionally substituted with OH, amino, halo, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 haloalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, cycloalkyl or heterocycloalkyl; 
 
         as to R c  and R d :
 R c  and R d  are each, independently, H, C 1-10  alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, heteroaryl, cycloalkyl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl, wherein:
 the C 1-10  alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, heteroaryl, cycloalkyl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl is optionally substituted with OH, amino, halo, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 haloalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, cycloalkyl or heterocycloalkyl; or 
 
 R c  and R d  together with the N atom to which they are attached form a 4-, 5-, 6- or 7-membered heterocycloalkyl group; and 
 
         as to R c′  and R d′ :
 R c′  and R d′  are each, independently, H, C 1-10  alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, heteroaryl, cycloalkyl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl, wherein:
 the C 1-10  alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, aryl, heteroaryl, cycloalkyl, heterocycloalkyl, arylalkyl, heteroarylalkyl, cycloalkylalkyl or heterocycloalkylalkyl is optionally substituted with OH, amino, halo, C 1-6  alkyl, C 1-6 haloalkyl, C 1-6 haloalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, cycloalkyl or heterocycloalkyl; or 
 
 R c′  and R d′  together with the N atom to which they are attached form a 4-, 5-, 6- or 7-membered heterocycloalkyl group.