What question did this study set out to answer?

To establish an efficient oxidative coupling method for preparing 1,4-benzodioxans and apply it to the biomimetic synthesis of silybin and isosilybin.

January 1, 1980Journal of the Chemical Society Perkin Transactions 1

Benzodioxans by oxidative phenol coupling. Synthesis of silybin

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Authors

LMLucio MerliniUniversity of Parma AZA. ZANAROTTIPolitecnico di Milano APAndrew PelterSwansea University

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Implication

Chemical synthesis study demonstrates silver oxide-mediated oxidative phenol coupling to produce benzodioxans, highlighting an efficient biomimetic route to flavanolignans.

Key Points

To establish an efficient oxidative coupling method for preparing 1,4-benzodioxans and apply it to the biomimetic synthesis of silybin and isosilybin.
Coupled substituted catechols with isoeugenol or coniferyl alcohol in the presence of silver oxide.
Conducted a one-step biomimetic reaction between (2R,3R)-dihydroquercetin and coniferyl alcohol to generate flavanolignans.
Oxidative coupling produced 2,3-trans-1,4-benzodioxans in good yields via a proposed free-radical mechanism.
Reactions showed high regioselectivity with alkyl-substituted catechols, but notably decreased regioselectivity with electrophilic substituents.
Achieved a high-yield, one-step biomimetic synthesis of the natural flavanolignans silybin and isosilybin.

Cite This Study

Merlini et al. (1980) studied this question.

synapsesocial.com/papers/6a9d80a315f03e7590bf1b7c https://doi.org/10.1039/p19800000775

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Implication

Chemical synthesis study demonstrates silver oxide-mediated oxidative phenol coupling to produce benzodioxans, highlighting an efficient biomimetic route to flavanolignans.

Benzodioxans by oxidative phenol coupling. Synthesis of silybin

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Implication

Key Points

Cite This Study

Benzodioxans by oxidative phenol coupling. Synthesis of silybin

Discussion

Member takes

Implication

Key Points

Cite This Study

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