- Discovery and hit-to-lead optimization of pyrrolopyrimidines as potent, state-dependent Nav1.7 antagonists
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Herein we describe the discovery, optimization, and structure-activity relationships of novel potent pyrrolopyrimidine Nav1.7 antagonists. Hit-to-lead SAR studies of the pyrrolopyrimidine core, head, and tail groups of the molecule led to the identification of pyrrolopyrimidine 48 as exceptionally potent Nav1.7 blocker with good selectivity over hERG and improved microsomal stability relative to our hit molecule and pyrazolopyrimidine 8 as a promising starting point for future optimization efforts.
- Chakka, Nagasree,Bregman, Howie,Du, Bingfan,Nguyen, Hanh Nho,Buchanan, John L.,Feric, Elma,Ligutti, Joseph,Liu, Dong,McDermott, Jeff S.,Zou, Anruo,McDonough, Stefan I.,Dimauro, Erin F.
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scheme or table
p. 2052 - 2062
(2012/04/17)
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- Synthesis and anticonvulsant activity of N-benzylpyrrolo[2,3-d]-, - pyrazolo[3,4-d]-, and -triazolo[4,5-d]pyrimidines: Imidazole ring-modified analogues of 9-(2-fluorobenzyl)-6-(methylamino)-9H-purine
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Analogues of 9-(2-fluorobenzyl)-6-(methylamino)-9H-purine (1) containing isosteric replacements of the imidazole ring atoms were synthesized and tested for anticonvulsant activity. The pyrrolo[2,3-d]-, pyrazolo[a,4-d]-, and triazolo[4,5-d]pyrimidines were less active than 1 against maximal electroshock-induced seizures (MES) in rats when given po. The differences in anti-MES activity for these analogues was not explained by differences in pK(a) or lipophilicity. However, the four classes of heterocycles have distinctly different calculated electrostatic isopotential maps, which may be related to optimum anticonvulsant activity.
- Kelley,Davis,McLean,Glen,Soroko,Cooper
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p. 3884 - 3888
(2007/10/03)
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