Palladium-catalysed coupling reaction of allenic alcohols with aryl- and alkenylboronic acids
The direct coupling of aryl- and alkenylboronic acids with allenic alcohols has been achieved using a palladium catalyst to yield various substituted dienes and trienes in high yields.
Regiocontrolled addition of arylboronic acids to allenes using palladium and platinum catalysts
(Chemical Equation Presented) Studies about the regiocontrolled addition of arylboronic acids to allenes using a palladium or a platinum catalyst have been described. The selectivity of the reaction can be altered by the choice of the metal reagent and base. Contrary to the formation of endo-olefinic products in the reactions using hydroxopalladium complex, predominant production of exo-olefinic products was observed by the reaction with hydroxoplatinum complex.
NUCLEOPHILIC SUBSTITUTION OF α-ALLENIC ALCOHOLS VIA THE MURAHASHI METHOD: 1,3-DIENES SYNTHESIS.
The alkylation of α-allenic alcohols 1 by the Murahashi procedure leads to 1,3-dienes 4.This process allows the direct nucleophilic substitution of labile or hindered α-allenic alcohols by organolithium reagents.
Fan, Changlie,Cazes, Bernard
p. 1701 - 1704
(2007/10/02)
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