Substitution reactions of secondary halides and epoxides with higher order, mixed organocuprates, R2Cu(CN)Li2: synthetic, stereochemical, and mechanistic aspects
Construction of Enantioenriched Cyclic Compounds by Asymmetric Allylic Alkylation and Ring-Closing Metathesis
作者:Francesca Giacomina、Alexandre Alexakis
DOI:10.1002/ejoc.201300971
日期:2013.10
A new approach to highly enantioenrichedcycliccompounds (up to 98 % ee) has been developed by using ω-ethylenic allylic substrates in a one-pot asymmetricallylicalkylation and ring-closingmetathesis sequence. The starting compounds are synthetic equivalents of cyclicallylic substrates. The method is exemplified with both Cu and Ir catalysts, and chiral phosphoramidite ligands.
通过在一锅不对称烯丙基烷基化和闭环复分解序列中使用 ω-烯属烯丙基底物,开发了一种高度对映体富集的环状化合物(高达 98% ee)的新方法。起始化合物是环状烯丙基底物的合成等价物。该方法以 Cu 和 Ir 催化剂以及手性亚磷酰胺配体为例。
Chemistry of higher order, mixed organocuprates. 1. Substitution reactions at unactivated secondary centers
作者:Bruce H. Lipshutz、Robert S. Wilhelm、David M. Floyd
DOI:10.1021/ja00415a055
日期:1981.12
LIPSHUTZ, B. H.;WILHELM, R. S.;FLOYD, D. M., J. AMER. CHEM. SOC., 1981, 103, N 25, 7672-7674