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.
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