Palladium catalysed cross-coupling of vinyl triflates with 9-alkyl-9-borobicyclo[3,3,1]nonanes. total synthesis of (−)-Isoseiridine.
作者:Ronald Grigg、Peter Kennewell、Vladimir Savic
DOI:10.1016/s0040-4020(01)80703-1
日期:1994.5
Catalysed cross-coupling of butenolide-3-triflates to 9-alkyl-9-borobicyclo[3.3.1]nonanes occurs in moderate to good yield and tolerates a range of functionality. Application of this methodology combined with addition of diethylzinc to a butenolide aldehyde in the presence of an ephedrine derivative leads to a 3-step synthesis of (−)-isoseiridine with 88%e.e. in good yield.
Pd(O)催化的丁烯内酯-3-三氟甲磺酸酯到9-烷基-9-硼双环[3.3.1]壬烷的交叉偶联反应具有中等至良好的收率,并具有一定的功能范围。该方法的应用与在麻黄碱衍生物存在下将二乙基锌加到丁烯醛中的方法相结合,可实现收率达88%ee的(-)-异水苏啶的3步合成。