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Palladium-catalyzed phenylation of allylic acetates by tetraphenylborate anion

โœ Scribed by Jean-Yves Legros; Jean-Claude Fiaud

Book ID
104221831
Publisher
Elsevier Science
Year
1990
Tongue
French
Weight
235 KB
Volume
31
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

Commercial sodium tetraphenylborate is a convenient phenylating reagent in the palladium(O)-catalyzed substitution of allylic acetates. Two phenyl groups of NaBPh4 are available for transfer. Triphenylboron is also a phenylating agent in this reaction.

We report here the use of sodium tetraphenylborate as a convenient carbo-

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## Reaction of allylic acetates with tetrakis (triphenylphosphine) Dnlladiumleadsto oositional and stereochemical isomerism. A mechanism is proposed. Elimination of ally1 acetates to dienes is also observed and constitutes a u efu synthetic procedure. The use of bis(benzenesulfonyl)methane as a '