4.7 Article

Total Asymmetric Synthesis and Stereochemical Confirmation of (+)-and (-)-Lyoniresinol and Its Deuterated Analogues

Journal

JOURNAL OF ORGANIC CHEMISTRY
Volume 87, Issue 6, Pages 4254-4262

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c03085

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Funding

  1. University of Auckland

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Lyoniresinol and its derivatives are natural compounds with various biological activities, which have been found in a wide range of plant species as well as in wines and spirits with gustatory effects. The first total asymmetric synthesis of these natural products and their deuterated analogues has been achieved, confirming their structure and stereochemistry. The synthesized compounds can serve as internal standards for improving lyoniresinol quantitation methods in the future.
Lyoniresinol and its derivatives are lignans which have been isolated from a plethora of plant species. In addition to exhibiting a range of interesting biological activities including anticancer, anti-inflammatory, antimicrobial, and others, these compounds have also been discovered in wines and spirits and shown to have gustatory effects in these alcoholic matrices. (+)-Lyoniresinol 1 is reported to impart a strong bitter taste while its enantiomer (-)-lyoniresnol 2 is tasteless. The first total asymmetric synthesis of both natural enantiomers (+)-i and (-)-2 and their deuterated analogues (D-4)-(+)-3 and (D-4)-(-)-4 has been achieved, confirming the structure and stereochemistry of the natural products. The synthesized compounds can be utilized as internal standards in stable isotope dilution analysis for improving and optimizing the existing lyoniresinol quantitation methods in the future.

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