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An impurity produced in the synthesis of compound I is separated and identified as its enantiomer II using normal-phase chiral high-performance liquid chromatography (HPLC) with UV absorbance, optical rotation (OR) and mass spectrometric (MS) detection. The results show that the impurity II and compound I have equal and opposite specific rotations,… (More)
A series of 2-methoxyacylhydrazones were optimized to yield compounds with high affinity for PDE10A. Several compounds demonstrated efficacy in animal models of schizophrenia, including conditioned avoidance response and a pro-psychotic phencyclidine hyperactivity model.
Cyclic nucleotide phosphodiesterases (PDEs) are represented by a large superfamily of enzymes. A series of hydrazone-based inhibitors was synthesized and shown to be novel, potent, and selective against PDE10A. Optimized compounds of this class were efficacious in animal models of schizophrenia and may be useful for the treatment of this disease.