Enantioselective Catalytic [3 + 3] Cycloaddition of Donor–Acceptor Aziridines with
<i>m‐N,N</i>
‐Dialkylaminophenyl Methylidenemalonates
作者:Sung‐Gon Kim
DOI:10.1002/bkcs.11758
日期:2019.7
Copper(I)‐catalyzed cyclization reactions of ethyl (E)‐α‐ethynyl‐β‐aryl‐α,β‐unsaturated esters with N‐sulfonyl azides for the synthesis of 1‐aminonaphthalenes, 3‐aminobenzofurans, and 3‐aminothiobenzofurans.
Herein we report a highly para-selective C–H olefination of anilinederivatives by a Pd/S,O-ligand-based catalyst. The reaction proceeds under mild reaction conditions with high efficiency and broad substrate scope, including mono-, di-, and trisubstituted tertiary, secondary, and primary anilines. The S,O-ligand is responsible for the dramatic improvements in substrate scope and the high para-selectivity