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Bioorg Med Chem Lett. 2008 Jan 15;18(2):509-12. doi: 10.1016/j.bmcl.2007.11.098. Epub 2007 Dec 3.

Non-charged thiamine analogs as inhibitors of enzyme transketolase.

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  • 1Array BioPharma Inc., 3200 Walnut Street, Boulder, CO 80301, USA. athomas@arraybiopharma.com

Abstract

Inhibition of the thiamine-utilizing enzyme transketolase (TK) has been linked with diminished tumor cell proliferation. Most thiamine antagonists have a permanent positive charge on the B-ring, and it has been suggested that this charge is required for diphosphorylation by thiamine pyrophosphokinase (TPPK) and binding to TK. We sought to make neutral thiazolium replacements that would be substrates for TPPK, while not necessarily needing thiamine transporters (ThTr1 and ThTr2) for cell penetration. The synthesis, SAR, and structure-based rationale for highly potent non-thiazolium TK antagonists are presented.

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