Reaching the south: metal-catalyzed transformation of the aromatic para-position

Abstract

Regioselective functionalization of aromatic arenes has created a rapid insurgence in the modern era of organic chemistry. While the last few years have witnessed significant developments on site-selective ortho- and meta-C–H transformations, there existed very few reports on para-C–H functionalization. Recent advancements on template assisted protocols in para-C–H activation has emerged as a popular and convenient feat in this area. This review highlights the various protocols developed over the years for selective installation of suitable functional groups at the para-position of arenes thereby transforming them into value-added organic cores.