Efficient Construction of Oligocholate Foldamers via “Click” Chemistry and Their Tolerance of Structural Heterogeneity

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2009-01-01
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Pan, Xingang
Zhao, Yan
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Zhao, Yan
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Chemistry

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Abstract

The 1,3-dipolar cycloaddition between an alkynyl-terminated cholate trimer and an azido-functionalized cholate hexamer readily afforded the nonamer and dodecamer derivatives, whereas amide coupling employed in previous oligocholate synthesis failed beyond the octamer. Unlike typical oligocholate foldamers with exclusively head-to-tail arrangement of the repeat units, the newly synthesized “clicked” oligocholates contained head-to-head arrangement and flexible tethers in the sequence. Despite large structural perturbations, the clicked oligocholates folded similarly as the parent foldamers, demonstrating the robustness of the solvophobically driven folding mechanism.

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Reprinted (adapted) with permission from Organic Letters 11 (2009): 69, doi:10.1021/ol802364c. Copyright 2009 American Chemical Society.

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Thu Jan 01 00:00:00 UTC 2009
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