Palladium–NHC-Catalyzed Allylic Alkylation of Pronucleophiles with Alkynes
作者:Wei Ren、Qian-Ming Zuo、Yan-Ning Niu、Shang-Dong Yang
DOI:10.1021/acs.orglett.9b02937
日期:2019.10.4
The palladium-N-heterocyclic carbene (NHC)-catalyzed allylicalkylation of various pronucleophiles with alkynes has been accomplished under mild conditions. The protocol exhibits broad functional group compatibility and high atom economy. Moreover, the catalytic process avoids the use of external oxidants and acid as additives.
Catalytic Double Stereoinduction in Asymmetric Allylic Alkylation of Oxindoles
作者:Barryâ M. Trost、Yong Zhang
DOI:10.1002/chem.200902770
日期:2010.1.4
A highly regio‐, diastereo‐, and enantioselective allylicalkylation reaction of 3‐monosubstituted oxindoles catalyzed by molybdenum is described. The reaction is affected by the electronic and steric variations of the nucleophile. The use of appropriate N‐protecting group is particularly important for achieving high regio‐ and diastereoselectivity. Products from this reaction, containing vicinal quaternary‐tertiary
描述了钼催化的 3-单取代羟吲哚的高度区域、非对映和对映选择性烯丙基烷基化反应。该反应受到亲核试剂的电子和空间变化的影响。使用适当的 N 保护基团对于实现高区域和非对映选择性特别重要。该反应的产物含有邻位季-叔立构中心,是有价值的合成中间体,应该在生物碱合成中得到应用。