An efficient and mild ortho-zincation of aromatics and heterocycles by using TMP2Mg·2LiCl in the presence of ZnCl2

A variety range of functionalized aryl and heteroaryl zinc reagents were efficiently generated by using TMP2Mg·2LiCl (TMP = 2,2,6,6-tetramethylpiperamidyl) in the presence of ZnCl2. The subsequently functionalization gave after reaction with electrophiles the expected polyfunctionalized products in good yields. A detailed study concerned on the point how we found the protocol and how we optimized it was depicted.