On-resin N-methylation of cyclic peptides for discovery of orally bioavailable scaffolds.

On-resin N-methylation of cyclic peptides for discovery of orally bioavailable scaffolds.
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DOI:
10.1038/nchembio.664
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发表时间:
2011-09-25
影响因子:
14.8
通讯作者:
Lokey, R. Scott
Lokey, R. Scott
中科院分区:
生物学1区
文献类型:
--
作者:
White, Tina R.;Renzelman, Chad M.;Rand, Arthur C.;Rezai, Taha;McEwen, Cayla M.;Gelev, Vladimir M.;Turner, Rushia A.;Linington, Roger G.;Leung, Siegfried S. F.;Kalgutkar, Amit S.;Bauman, Jonathan N.;Zhang, Yizhong;Liras, Spiros;Price, David A.;Mathiowetz, Alan M.;Jacobson, Matthew P.;Lokey, R. Scott

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Backbone N-methylation is common among peptide natural products and has a significant impact on both the physical properties and the conformational states of cyclic peptides. However, the specific impact of N-methylation on passive membrane diffusion in cyclic peptides has not been investigated systematically. Here we report a method for the selective, on-resin N-methylation of cyclic peptides to generate compounds with drug-like membrane permeability and oral bioavailability. The selectivity and degree of N-methylation of the cyclic peptide was determined by backbone stereochemistry, suggesting that conformation dictates the regiochemistry of the N-methylation reaction. The permeabilities of the N-methyl variants were corroborated by computational studies on a 1024-member virtual library of N-methyl cyclic peptides. One of the most permeable compounds, a cyclic hexapeptide (MW = 755) with three N-methyl groups, showed an oral bioavailability of 28% in rat.
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