Metal-Free ortho C–H Borylation of Thiobenzamides

A BBr3-mediated S-directed ortho C–H borylation of thiobenzamides was developed. A variety of ortho-borylated thiobenzamides were obtained in moderate to good yields with a wide functional group tolerance under simple and metal-free conditions. This transformation provided a convenient and practical route to important functionalized thiobenzamides.