期刊
BIOORGANIC & MEDICINAL CHEMISTRY
卷 25, 期 20, 页码 5327-5340出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2017.07.052
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A novel 4-aminoindazole sulfonamide hit (13) was identified as a human CCR4 antagonists from testing a focussed library of compounds in the primary GTPcS assay. Replacing the indazole core with a pyrazolopyrimidine, and introduction of a methoxy group adjacent to the sulfonamide substituent, resulted in the identification of pyrazolopyrimidine 37a, which exhibited good binding affinity in the GTPcS assay (pIC(50) = 7.2), low lipophilicity (c logP = 2.2, chromlog D-7.4 = 2.4), high LE (0.41), high solubility (CLND solubility >= 581 mu M), and an excellent PK profile in both the rat (F = 62%) and the dog (F = 100%). Further SAR investigation of the pyrazolopyrimidine suggested that substitution at N1 is tolerated, providing a suitable vector to modulate the properties, and increase the potency in a lead optimisation campaign. (C) 2017 Elsevier Ltd. All rights reserved.
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