Achievement of regioselectivity in transition metal-catalyzed direct C-H (hetero)arylation reactions of heteroarenes with one heteroatom through the use of removable protecting/blocking substituents or traceless directing groups
Keywords: Chemoselectivity; Regioselectivity; Direct C-H (hetero)arylation; Transition metal catalysts; Removable groups; Traceless directing groups; Deprotection; Ac; acetyl; acac; acetylacetonate; 1-Ad; 1-adamantyl; AIBN; azobisisobutyronitrile; Ar; aryl; Boc;