Diastereoselective ruthenium-catalysed cycloisomerisation of diallyllactones: preparation of exo-methylene spirolactones
作者:Mathieu Michaut、Maurice Santelli、Jean-Luc Parrain
DOI:10.1016/s0040-4039(03)00144-8
日期:2003.3
Diallyllactones (obtained from cyclic anhydrides via a double allylation reaction promoted by titanium tetrachloride) were cycloisomerised using 5 mol% of cyclooctadienyl ruthenium dichloride in ethanol providing the corresponding exomethylene spirolactones in good yields, with moderated to good diastereomeric excess.
使用5摩尔%的环辛二烯基二氯化钌在乙醇中的环异构化二烯丙基内酯(通过四氯化钛促进的双烯丙基化反应从环状酸酐中获得),以适当的收率提供适度至良好的非对映异构体过量的相应的外亚甲基螺内酯。