Catalytic Asymmetric Iodocarbocyclization Reaction of 4-Alkenylmalonates and Its Application to Enantiotopic Group Selective Reaction
作者:Tadashi Inoue、Osamu Kitagawa、Akio Saito、Takeo Taguchi
DOI:10.1021/jo970970d
日期:1997.10.1
The iodocarbocyclization reaction of 4-alkenylmalonate derivatives proceeded with excellent enantioselectivity (>/=95% ee) in the presence of 10-40 mol % of Ti(TADDOLate)(2). The Ti(TADDOLate)(2)-mediated catalytic asymmetric reaction was extended to the enantiotopic group selective reaction of bisalkenylated malonates, giving rise to trisubstituted cyclopentanoid compounds with both high diastereoselectivity
在10-40 mol%的Ti(TADDOLate)(2)存在下,4-烯基丙二酸酯衍生物的碘碳环化反应以出色的对映选择性(> / = 95%ee)进行。Ti(TADDOLate)(2)介导的催化不对称反应扩展至双烯基化丙二酸酯的对映体基团选择性反应,产生具有高非对映选择性(86-94%de)和出色的对映选择性(> / = 95)的三取代环戊烷化合物%ee)。从本反应的产物也有效地合成了(+)-sch草内酯。