N-Benzylhydroxylamine Addition to β-Aryl Enoates. Enantioselective Synthesis of β-Aryl-β-amino Acid Precursors
摘要:
[GRAPHICS]Chiral Lewis acid catalyzed N-benzylhydroxylamine addition to pyrrolidinone-derived enoates afforded beta-aryl-beta-amino acid derivatives in high enantiomeric purity with moderate to very good chemical efficiency.
<i>N</i>-Acylation of Oxazolidinones via Aerobic Oxidative NHC Catalysis
作者:Linda Ta、Anton Axelsson、Henrik Sundén
DOI:10.1021/acs.joc.8b01723
日期:2018.10.5
synthetically useful oxazolidinones with aldehydes using aerobicoxidative NHC catalysis is reported. The reaction offers a broad scope of functionalized oxazolidinones in good to excellent yields. Careful choice of electron transfer mediators proved pivotal to achieve efficient aerobic N-acylation, which has previously proven difficult using NHC catalysis. The methodology allows a mild entry to acylated oxazolidinones
<i>N</i>-Benzylhydroxylamine Addition to β-Aryl Enoates. Enantioselective Synthesis of β-Aryl-β-amino Acid Precursors
作者:Mukund P. Sibi、Mei Liu
DOI:10.1021/ol006500e
日期:2000.10.1
[GRAPHICS]Chiral Lewis acid catalyzed N-benzylhydroxylamine addition to pyrrolidinone-derived enoates afforded beta-aryl-beta-amino acid derivatives in high enantiomeric purity with moderate to very good chemical efficiency.
Meta-substituted piperlongumine derivatives attenuate inflammation in both RAW264.7 macrophages and a mouse model of colitis
作者:Ziqing Wang、Wenwen Mu、Zhaotang Gong、Guoyun Liu、Jie Yang
DOI:10.1016/j.bioorg.2021.105465
日期:2021.12
Enantioselective Michael Addition to α,β-Unsaturated Imides Catalyzed by a Bifunctional Organocatalyst
Highly Enantioselective Copper-Phosphoramidite-Catalyzed Conjugate Addition of Dialkylzinc Reagents to Acyclic α,β-Unsaturated Imides
作者:Mauro Pineschi、Federica Del Moro、Valeria Di Bussolo、Franco Macchia
DOI:10.1002/adsc.200505309
日期:2006.2
the β-position of aliphatic carboxylic acid derivatives with high enantioselectivities by the use of a commercially available chiral ligand is reported. N-Acylpyrrolidinones, as simple derivatives of an α,β-unsaturated carboxylic acid, were found to be the substrates of choice featuring good reactivity and high enantioselectivities (up to >99% ee).