4-SUBSTITUTED 4, 6-DIALKOXY-CINNOLINE DERIVATIVES AS PHOSPODIESTERASE 10 INHIBITORS FOR THE TREATMENT OF PSYCHIATRIC OR NEUROLOGICAL SYNDROMS

摘要

The present disclosure relates generally to the field of phosphodiesterase 10 (PDE10) enzyme inhibition by cinnoline compounds of Formulas: (I) and (II); wherein R'-R³ and R¹⁵-R¹⁸ are as defined herein. Still further, the present invention provides methods for synthesizing compounds with such activity and selectivity, as well as methods of and corresponding pharmaceutical compositions for treating a patient, e.g., mammals, including humans, in need of PDE inhibition. Treatment is preferably for a disease state that involves elevated intracellular PDE10 levels or decreased cAMP and/or cGMP levels, e.g., involving neurological or psychiatric syndromes, especially those states associated with psychoses, most especially schizophrenia or bipolar disorder, obsessive-compulsive disorder, and/or Parkinson's disease. In particular, such psychoses, obsessive-compulsive disorder, and/or Parkinson's disease are due at least in part to catabolism of intracellular cAMP and/or cGMP levels by PDE10 enzymes or where such an impaired condition can be improved by increasing cAMP and/or cGMP levels.