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Copper-mediated etherification of arenes with alkoxysilanes directed by an (2-aminophenyl)pyrazole group†
Jayaraman Selvakumar,Gowri Sankar Grandhi,Harekrishna Sahoo,Mahiuddin Baidya
RSC Advances Pub Date : 08/16/2016 00:00:00 , DOI:10.1039/C6RA18861C
Abstract

An efficient copper-mediated etherification of inert C–H bonds of (hetero)arenes with reagent-amounts of alkoxysilanes and alkanols has been developed using (2-aminophenyl)pyrazole (2-APP) as a removable directing group. The reaction is scalable, rapidly proceeds under an open atmosphere, and tolerates diverse functional groups to provide alkyl aryl ethers in high yields (up to 87%). As an application, the formal synthesis of anti-emetic drug metoclopramide is accomplished.

Graphical abstract: Copper-mediated etherification of arenes with alkoxysilanes directed by an (2-aminophenyl)pyrazole group
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