Catalytic Asymmetric Hetero-Diels−Alder Reactions of Ketones: Chemzymatic Reactions
作者:Sulan Yao、Mogens Johannsen、Hélène Audrain、Rita G. Hazell、Karl Anker Jørgensen
DOI:10.1021/ja981710w
日期:1998.9.1
copper(II) bisoxazolines are very effective catalysts for the reaction, leading to products with very high enantiomeric enrichment (up to 99.8% enantiomeric excess) using the lowest loading of a chiralLewisacidcatalyst observed (down to 0.05 mol %). The catalytic hetero-Diels−Alderreaction of ketones has been developed to be a general reaction which proceeds well with very highturnovernumbers, isolated
Asymmetric hetero‐Diels‐Alder Reaction of
<i>trans</i>
‐1‐Methoxy‐3‐trimethylsilyloxy‐buta‐1,3‐diene Catalyzed by Zinc Complexes
作者:Matylda Stefaniak、Szymon Buda、Jacek Mlynarski
DOI:10.1002/ejoc.202000822
日期:2020.9.7
Catalyticasymmetric hetero‐Diels‐Alder (hDA) reaction of Danishefsky diene with α‐carbonyl esters have been performed with a zinc‐based catalyst that is readily available from zinc triflate and bisoxazoline ligands.
Asymmetric hetero Diels–Alder route to quaternary carbon centers: synthesis of (−)-malyngolide
作者:Arun K Ghosh、Michio Shirai
DOI:10.1016/s0040-4039(01)01227-8
日期:2001.9
catalyzed asymmetric hetero Diels–Alder reactions of Danishefsky's diene and a variety of α-keto esters constructed quaternary carbon centers enantioselectively. The reaction was utilized in the synthesis of (−)-malyngolide.
A versatile catalyst for asymmetric reactions of carbonyl groups working purely by activation through hydrogen bonding: Mukaiyama-aldol, hetero Diels–Alder and Friedel–Crafts reactions
作者:Wei Zhuang、Thomas B. Poulsen、Karl Anker Jørgensen
DOI:10.1039/b507778h
日期:——
to be promising candidates for the efficient activation of carbonyl compounds throughhydrogenbonding. Exemplified by three carbonyl addition reactions: Mukaiyama-aldol, hetero Diels-Alder and Friedel-Crafts reactions we show that bis-triflamides or bis-nonaflamides of commercially available chiral diamines act as chiral Bronsted-acid catalysts, leading to the optically active products in moderate
The first highly enantioselective catalytic hetero-Diels–Alder reaction of ketones
作者:Mogens Johannsen、Sulan Yao
DOI:10.1039/a706463b
日期:——
The first highly enantioselective catalytic hetero-DielsâAlder reaction of various aliphatic and aromatic ketones with an activated conjugated diene catalysed by chiral copper(II) complexes with enantiomeric excesses up to 99% is presented.