A simple enantioselective preparation of (2S,5S)-2,5-diphenylpyrrolidine and related diaryl amines
摘要:
A short efficient catalytic asymmetric route to the preparation of C-2-symmetric diaryl cyclic amines is described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Concise Synthesis of the Antidepressive Drug Candidate GSK1360707 by a Highly Enantioselective Gold‐Catalyzed Enyne Cycloisomerization Reaction
作者:Henrik Teller、Alois Fürstner
DOI:10.1002/chem.201101346
日期:2011.7.4
depressing results are obtained from a gold‐catalyzed enyne cycloisomerization controlled by phosphoramidite ligands with TADDOL‐related but acyclic backbones (see scheme; Cbz=benzyloxycarbonyl). The “triple‐reuptake inhibitor” GSK1360707 was obtained in excellent yield and optical purity, therefore highlighting the relevance of asymmetric gold catalysis for practical applications.
Readily available phosphoramidites incorporating TADDOL-related diols with an acyclic backbone turned out to be excellent ligands for asymmetric gold catalysis, allowing a number of mechanistically different transformations to be performed with good to outstanding enantioselectivities. This includes [2 + 2] and [4 + 2] cycloadditions of ene-allenes, cycloisomerizations of enynes, hydroarylation reactions
Direct α-C–H bondfunctionalization of unprotected cyclic amines Direct α-C–H bondfunctionalization of unprotected cyclic amines, Published online: 06 November 2017; doi:10.1038/nchem.2871NatureArticleSnippet(type=short-summary, markup= Cyclic amines bearing α-substituents are valuable building blocks for drug discovery and natural product synthesis. Introduction of α-substituents via site-selective
Enantioselective iridium‐catalyzed allylic substitutions were used to prepare N‐allyl hydroxamic acid derivatives that were suitable for ring‐closing metathesis, giving N‐methoxylactams. Reactions of these derivatives with Grignard or organolithium compounds gave hemiaminals, which could be reduced diastereoselectively via acyliminium intermediates to give cis‐piperidines or cis‐pyrrolidines with substituents