Cp*Rh(III)‐Catalyzed C8 C−H Alkylation of Quinoline
<i>N</i>
‐Oxides with Diazo Meldrum's Acid
作者:Malcolm P. Huestis、Jean‐Philippe Leclerc、Robin Larouche‐Gauthier、Samuel Aubert‐Nicol、Arun Yadav、Koilpitchai Sivamuthuraman
DOI:10.1002/ejoc.202001584
日期:2021.1.22
A C8‐selective Cp*Rh(III)‐catalyzed C−H alkylation of quinoline N‐oxides using commercially available diazo Meldrum's acid is reported. The reaction employs a widely available catalyst and enables the synthesis of a variety of 8‐quinolinylacetic acid esters on gram scale.
An efficient copper(I)-catalyzed direct regioselective arylamination of various heterocyclic N-oxides was achieved successfully under redox-neutral conditions using anthranils as arylaminating reagents. The developed protocol is simple, straightforward, and economic with a broad range substrate scope. The dual functional groups in the final molecules were utilized to construct structurally and functionally diverse nitrogen-containing organic x-conjugated systems.