Efficient preparation of trisubstituted alkenes using the SmI2 modification of the Julia–Lythgoe olefination of ketones and aldehydes
作者:István E Markó、Fiona Murphy、Lucien Kumps、Ali Ates、Roland Touillaux、Donald Craig、Santiago Carballares、Simon Dolan
DOI:10.1016/s0040-4020(01)00079-5
日期:2001.3
High yields of di- and tri-substituted alkenes are obtained by a modification of the Julia–Lythgoe olefination reaction involving the in situ capture of intermediate β-alkoxy-sulfones by benzoyl or trimethylsilyl chloride, followed by SmI2-mediated reductive elimination. This novel protocol also provides a connective preparation of dienyl ethers, which are important partners in Diels–Alder cycloadditions
通过对Julia-Lythgoe烯烃化反应的改性,包括通过苯甲酰基或三甲基甲硅烷基氯原位捕获中间体β-烷氧基砜,然后通过SmI 2介导的还原消除,可以得到高收率的二取代和三取代的烯烃。该新颖的方案还提供了二烯基醚的连接制备,二烯基醚是Diels-Alder环加成反应的重要伙伴。