Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 30, Pages 10954-10957Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja405503y
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan
- Japan Science and Technology Agency
- Japan Society for the Promotion of Science for Young Scientists
- Grants-in-Aid for Scientific Research [12J09618] Funding Source: KAKEN
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Pd-catalyzed direct carboxylation of alkenyl C-H bonds with carbon dioxide was realized for the first time. Treatment of 2-hydroxystyrenes and a catalytic amount of Pd(OAc)(2) with Cs2CO3 under atmospheric pressure of CO2 afforded corresponding coumarins in good yield. Furthermore, isolation of the key alkenylpalladium intermediate via C-H bond cleavage was achieved. The reaction was proposed to undergo reversible nucleophilic addition of the alkenylpalladium intermediate to CO2.
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