The Novel Sequence Diels-Alder Reaction/Ireland-Claisen Rearrangement Applied to Acyclic Dienophiles: New Insights into the Selectivity of the Ireland-Claisen Rearrangement
作者:Jörg Velker、Jean Philippe Roblin、Antonia Neels、Ana Tesouro、Helen Stoeckli-Evans、Frank-Gerrit Klaerner、Jan-Stefan Gehrke、Reinhard Neier
DOI:10.1055/s-1999-3093
日期:——
The new dienes 4a-d, 7 and 11 reacted in good yields with acyclic dienophiles like methyl acrylate and diethyl fumarate in the tandem process Diels-Alder reaction/Ireland-Claisen rearangement. Analysis of the relative configuration of products 5, 6, 8-10 and 12 indicated that preference for the chair or boat transition state of the Ireland-Claisen rearrangement is stronlgy influenced by the relative configuration of the substituents of the cyclohexene ring.
在 Diels-Alder 反应/爱尔兰-克莱森重排串联过程中,新二烯烃 4a-d、7 和 11 与丙烯酸甲酯和富马酸二乙酯等无环二烯烃发生了良好的反应。对产物 5、6、8-10 和 12 的相对构型的分析表明,爱尔兰-克莱森重排的椅型或舟型过渡态的偏好受到环己烯环上取代基相对构型的强烈影响。