“…Recently,s everal elegant strategies have been developed to address this issue, [16g,i, 17-19] for example,s teric-hindrancesensitive borylation, [17] ruthenium-catalyzed meta-selective C À Hf unctionalization, [18] and the use of aU -shaped template. [19] As eparate approach using Pd II /NBE cooperative catalysis was developed by the groups of Yu,Dong, Zhao,Shi, Ferreira, and others, [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] who drew inspiration from the Catellani reaction. As shown in Scheme 10, by taking advantage of the directed ortho palladation and Catellanis It should be pointed out that in these meta-selective C À H functionalization processes,s toichiometric silver salts are usually needed, which may act as ab ase for the C À H activation steps,asanoxidant to prevent the formation of Pd 0 species,a sw ell as ahalogen anion scavenger to promote the formation of Pd IV species.F urther studies illustrated the use of this strategy in generating derivatives of phenylacetic acid, b-arylethylamines,b enzyl amines,a nilines,and phenols.…”