Abstract: Pyridine and pyrimidine compounds, and compositions containing them, and processes for preparing such compounds. Provided herein also are methods of treating disorders or diseases treatable by inhibition of PDE10, such as obesity, non-insulin dependent diabetes, schizophrenia, bipolar disorder, obsessive-compulsive disorder, and the like.

Abstract: Pyridine and pyrimidine compounds: or a pharmaceutically acceptable salt thereof, wherein m, n, R1, R2, R3, R4, R5, R6, R7, X1, X2, X3, X4, X5, X6, X7, X8, and Y are as defined in the specification; or a pharmaceutically acceptable salt thereof, wherein ring A, m, n, y, R2, R3, R4, R5, R6, R7, R8, R9, X1, X2, and ring A are as defined in the specification; and or a pharmaceutically acceptable salt thereof, wherein m, n, y, R2, R3, R4, R5, R6, R7, R9, X1, X2, and ring A are as defined in the specification; compositions containing them, and processes for preparing such compounds. Provided herein also are methods of treating disorders or diseases treatable by inhibition of PDE10, such as obesity, non-insulin dependent diabetes, schizophrenia, bipolar disorder, obsessive-compulsive disorder, and the like.