作者:Peter Metz、Cornelia Mues、Andreas Schoop
DOI:10.1016/s0040-4020(01)88203-x
日期:1992.1
Polyhetero-[3,3]-sigmatropic rearrangements of allyl N-phenylimidates 4a - ▾ catalyzed by dichlorobis- (benzonitrile)palladium(II) are shown to afford N-allyl-N-phenylamides in good to excellent yields for substitution patterns that have so far precluded cyclization-induced allyl shifts. Using trichloroacetimidates of secondary allyl alcohols as substrates, the palladium(II)-catalyst effects a completely (E)
由二氯双-(苄腈)钯(II)催化的N-苯基亚氨酸甲酯烯丙基4a-▾的多- [3,3]-σ重排表明,N-烯丙基-N-苯基酰胺具有良好的收率,可以很好地取代具有迄今为止,还没有排除环化引起的烯丙基转移。使用仲烯丙醇的三氯乙酰亚胺酸酯作为底物,钯(II)催化剂在室温下实现完全(E)立体选择性重排,并进行完全手性转移。该反应已经应用于从(R)-2,3-0-异亚丙基甘油醛氢化物(17)开始的(R)-N-(三氯乙酰基)降冰片酚(18)的合成。