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Beyond the Diketopiperazine Family with Alternatively Bridged Brevianamide F Analogues

JOURNAL OF ORGANIC CHEMISTRY(2015)

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Abstract
A method for the preparation of 3,5-bridged piperazin-2-ones from a tryptophan proline-based diketopiperazine is described using diphosgene to induce the ring closure. Density functional theory calculations were conducted to study the mechanism of this C-C bond formation. Several derivatives of the thus obtained alpha-chloroamine were synthesized by substitution of the chlorine atom using a range of O-, N-, S-, and C-nucleophiles. This novel class of brevianamide F analogues possess interesting breast cancer resistance protein inhibitory activity.
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chemistry
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