Compositions and methods for treating cns disorders

Abstract

or a pharmaceutically acceptable salt thereof; wherein , A, R1, R2, R3a, R4a, R4b, R5, R7a, and R7b are as defined herein. Such compounds are envisioned, in certain embodiments, to behave as GABA modulators. The present invention also provides pharmaceutical compositions comprising a compound of the present invention and methods of use and treatment, e.g., such for inducing sedation and/or anesthesia.

1 - 73 . (canceled) 
     
     
         74 . A compound of the formula: 
       
         
           
           
               
               
           
         
       
     
     
         75 . A pharmaceutical composition comprising the compound of  claim 74  and a pharmaceutically acceptable excipient. 
     
     
         76 . A compound of formula: 
       
         
           
           
               
               
           
         
       
     
     
         77 . A pharmaceutical composition comprising the compound of  claim 76  and a pharmaceutically acceptable excipient. 
     
     
         78 . A compound of formula: 
       
         
           
           
               
               
           
         
       
     
     
         79 . A pharmaceutical composition comprising the compound of  claim 78  and a pharmaceutically acceptable excipient. 
     
     
         80 . A pharmaceutically acceptable salt of the compound according to  claim 74 ,  76 , or  78 . 
     
     
         81 . A pharmaceutical composition comprising a pharmaceutically acceptable salt according to  claim 80  and a pharmaceutically acceptable excipient.