The present invention relates to a compound represented by a formula (I): wherein X is a group represented by or the like; Y is a group represented by or the like; and Ar1 is a group represented by or a pharmaceutically acceptable salt thereof.
The present invention relates to a compound represented by a formula (I): wherein X is a group represented by or the like; Y is a group represented by or the like; and Ar
1
is a group represented by or a pharmaceutically acceptable salt thereof.
Synthesis and evaluation of a series of 2,4-diaminopyridine derivatives as potential positron emission tomography tracers for neuropeptide Y Y1 receptors
A series of 2,4-diaminopyridine derivatives was synthesized and evaluated as potential candidates for neuropeptide Y (NPY) Y1 receptor positron emission tomography (PET) tracers. Derivatives bearing substitutions allowing reliable access to radiolabeling were designed, focusing on Y1 binding affinity and lipophilicity. The advanced derivatives 2n and 2o were identified as promising PET tracer candidates. (C) 2009 Elsevier Ltd. All rights reserved.