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Chemical Structure| 13958-85-5 Chemical Structure| 13958-85-5
Chemical Structure| 13958-85-5

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Sun, Yang ; Rodríguez-Rangel, Sofia ; Zhang, Lauren L ; Sánchez-Rodríguez, Jorge E ; Brugarolas, Pedro ;

Abstract: 4-aminopyridine (4AP) is a potassium (K+) channel blocker used clinically to improve walking in people with multiple sclerosis (MS). 4AP binds to exposed K+ channels in demyelinated axons, reducing the leakage of intracellular K+ and enhancing impulse conduction. Multiple derivatives of 4AP capable of blocking K+ channels have been reported including three radiolabeled with positron emitting isotopes for imaging demyelinated lesions using positron emission tomography (PET). Here, we describe 3-fluoro-5-methylpyridin-4-amine (5Me3F4AP), a novel K+ channel blocker with potential application in PET. 5Me3F4AP has comparable potency to 4AP and the PET tracer 3-fluoro-4-aminopyridine (3F4AP). Compared to 3F4AP, 5Me3F4AP is more lipophilic (logD = 0.664 ± 0.005 vs. 0.414 ± 0.002) and slightly more basic (pKa = 7.46 ± 0.01 vs. 7.37 ± 0.07). In addition, 5Me3F4AP appears to be more permeable to an artificial brain membrane and more stable towards oxidation by the cytochrome P450 enzyme family 2 subfamily E member 1 (CYP2E1), responsible for the metabolism of 4AP and 3F4AP. Taken together, 5Me3F4AP has promising properties for PET imaging warranting additional investigation.

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Product Details of 5Me3F4AP

CAS No. :13958-85-5
Formula : C6H7FN2
M.W : 126.13
SMILES Code : NC1=C(F)C=NC=C1C
MDL No. :MFCD18261568
InChI Key :OUGVZDCOIWTZBH-UHFFFAOYSA-N
Pubchem ID :45116209

Safety of 5Me3F4AP

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338
 

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