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Practical C-H functionalization of quinones with boronic acids
Yuta Fujiwara1, Victoriano Domingo, Ian B Seiple
1Department of Chemistry and Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States.
A new method enables direct functionalization of quinones using boronic acids at room temperature. This scalable and cost-effective cross-coupling reaction is applicable to complex molecules.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
Background:
- Quinones are versatile compounds with diverse biological activities.
- Direct functionalization methods are crucial for synthesizing novel quinone derivatives.
Purpose of the Study:
- To develop a novel, scalable, and cost-effective method for direct quinone functionalization.
- To explore the scope and mechanism of this new reaction.
Main Methods:
- Direct cross-coupling of various quinones with boronic acids.
- Utilized catalytic silver(I) nitrate and a persulfate co-oxidant.
- Reaction performed at room temperature in an open flask.
Main Results:
- Broad scope observed for both quinones and alkyl/aryl boronic acids.
- Efficient cross-coupling achieved under mild conditions.
- Method successfully applied to complex substrates like steroids and natural products.
Conclusions:
- A new, direct, and scalable method for quinone functionalization has been established.
- The reaction proceeds via nucleophilic radical addition and in situ reoxidation.
- This approach offers a valuable tool for synthesizing complex quinone derivatives.
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