Palladium-catalyzed substitution of acrolein acetals by β-dicarbonyl nucleophiles
摘要:
beta-Dicarbonyl compounds with a high acidity (pKa < 8-9) easily react with acrolein diethyl or dimethyl acetals in the presence of a palladium catalyst and lead to allyl ethers. Some of these can be thermodynamically isomerized to enol ethers during their purification or substituted by another soft carbonucleophile under similar conditions, because of the leaving group property of the enolate of these stabilized beta-dicarbonyl unit. (C) 1998 Elsevier Science Ltd. All rights reserved.
Palladium-catalyzed substitution of acrolein acetals by β-dicarbonyl nucleophiles
作者:Nicolas Vicart、Jacques Goré、Bernard Cazes
DOI:10.1016/s0040-4020(98)00648-6
日期:1998.9
beta-Dicarbonyl compounds with a high acidity (pKa < 8-9) easily react with acrolein diethyl or dimethyl acetals in the presence of a palladium catalyst and lead to allyl ethers. Some of these can be thermodynamically isomerized to enol ethers during their purification or substituted by another soft carbonucleophile under similar conditions, because of the leaving group property of the enolate of these stabilized beta-dicarbonyl unit. (C) 1998 Elsevier Science Ltd. All rights reserved.