Zinca-ene-allene and zinc-enolate cyclization. Towards the synthesis of polysubstituted pyrrolidines
摘要:
The synthesis of polysubstituted pyrrolidines can be easily achieved in a diastereoselective and enantioselective way via the zinca-ene-allene and zinc-enolate cyclization. Copyright (C) 1996 Elsevier Science Ltd
Diastereoselective and Enantioselective Intramolecular Amino−Zinc−Enolate Carbometalation Reactions. A New Polysubstituted Pyrrolidines Synthesis
作者:Edwige Lorthiois、Ilane Marek、Jean F. Normant
DOI:10.1021/jo970813e
日期:1998.4.1
The amino-zinc-enolate cyclization allowed a new and straightforward route to polysubstituted pyrrolidines from simple starting materials. From this study, we have been able to determine, for the first time, the stereochemical influence of the substituents on the ring in the carbocyclization reaction. The diastereoselectivity thus obtained was explained by a chairlike amino-zinc-enolate transition state.
Stereoselective Synthesis of Functionalized Cyclic Amino Acid Derivatives via a [2,3]-Stevens Rearrangement and Ring-Closing Metathesis
作者:Aaron Nash、Arash Soheili、Uttam K. Tambar
DOI:10.1021/ol402129h
日期:2013.9.20
been developed. The process includes a palladium-catalyzed tandem allylic amination/[2,3]-Stevens rearrangement followed by a ruthenium-catalyzed ring-closing metathesis. The [2,3]-rearrangement proceeds with high diastereoselectivity through an exo transition state. Oppolzer’s chiralauxiliary was utilized to access an enantiopure cyclic amino acid by this approach, which will enable future biological
Zinca-ene-allene and zinc-enolate cyclization. Towards the synthesis of polysubstituted pyrrolidines
作者:Edwige Lorthiois、Ilane Marek、Jean-F. Normant
DOI:10.1016/s0040-4039(96)02222-8
日期:1997.1
The synthesis of polysubstituted pyrrolidines can be easily achieved in a diastereoselective and enantioselective way via the zinca-ene-allene and zinc-enolate cyclization. Copyright (C) 1996 Elsevier Science Ltd