RETRACTED: Asymmetric synthesis of highly enantioenriched 2-substituted piperidines and 6-substituted piperidine-2-ones by a combination enantioselective hydrazone allylation with ring closing metathesis
摘要:
An efficient method for the asymmetric synthesis of highly optically pure 2-substituted piperidines and 6-substituted piperidine-2-ones from aldehydes was developed by a sequence of enantioselective hydrazone allylation and ring closing metathesis. This method was found to be effective for a variety of substrates, showing substrate generality. The method's synthetic utility was illustrated in concise synthesis of the alkaloid (R)-(-)-coniine. (C) 2012 Elsevier Ltd. All rights reserved.
Indium(I)-Catalyzed Asymmetric Allylation, Crotylation, and α-Chloroallylation of Hydrazones with Rare Constitutional and High Configurational Selectivities
The hydra‐zone: The first example of asymmetric InI catalysis had been developed. InI combined with a chiral semicorrin ligand (L*) is an effective catalyst for enantioselective allylation, crotylation, and α‐chloroallylation of hydrazones. In the two latter cases, CC bond formations proceeded with highselectivity where both reactive aliphatic CCl and aromatic OH bonds were tolerated.
Indium-Mediated Catalytic Enantioselective Allylation of <i>N</i>-Benzoylhydrazones Using a Protonated Chiral Amine
作者:Sung Jun Kim、Doo Ok Jang
DOI:10.1021/ja1035336
日期:2010.9.8
A catalytic enantioselective indium-mediatedallylation of N-benzoylhydrazones in conjunction with a protonated chiral amine affording enantioenriched homoallylic amines with an extremely high level of enantioselectivity and chemical yield was developed.
RETRACTED: Asymmetric synthesis of highly enantioenriched 2-substituted piperidines and 6-substituted piperidine-2-ones by a combination enantioselective hydrazone allylation with ring closing metathesis
作者:Fengnu Piao、Mithilesh Kumar Mishra、Doo Ok Jang
DOI:10.1016/j.tet.2012.06.061
日期:2012.9
An efficient method for the asymmetric synthesis of highly optically pure 2-substituted piperidines and 6-substituted piperidine-2-ones from aldehydes was developed by a sequence of enantioselective hydrazone allylation and ring closing metathesis. This method was found to be effective for a variety of substrates, showing substrate generality. The method's synthetic utility was illustrated in concise synthesis of the alkaloid (R)-(-)-coniine. (C) 2012 Elsevier Ltd. All rights reserved.