## Abstract The coupling reaction of the α‐bromoalkenylphosphonates with organoboranes was investigated. The palladium‐catalyzed arylation took place successfully with arylboronic acids, while alkenylation proceeded with lithium alkenylborates and a nickel catalyst. In addition, an intramolecular D
Arylation of 8-Acetoxyoctalenone in a Nickel-Catalyzed Coupling Reaction with Lithium Arylborates
✍ Scribed by Yuichi Kobayashi; Michiko Ito
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 259 KB
- Volume
- 2000
- Category
- Article
- ISSN
- 1434-193X
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✦ Synopsis
In order to find a suitable organometallic compound and a catalyst for the arylation of 8-acetoxyoctalenone 4 (a stereoisomeric mixture of 4α and 4β), phenylation was first investigated with PhZnX (7: X = Cl; 8: X = Br)/Pd or Ni cat., PhSnBu 3 (9)/Pd cat. and LiCl, and [PhB(Bu)(OCHMeCH-MeO)]Li (10a)/Ni cat. Borate 10a provided the desired prod- [a]
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## Abstract A rapid and efficient cross‐coupling reaction of sodium tetraphenylborate with aryl bromides was carried out in water at 120 °C in the presence of a polymer‐supported palladium catalyst and potassium carbonate under focused microwave irradiation. All four phenyl groups of sodium tetraph