The presenting study can be divided into two parts. The first part of the study of sulfamate esters compound containing (six ring、five ring、four ring and Acetal group) as the starting materials in PdCo(OAc)4 catalyzed C - H amination reaction. Starting material with radical clock (cyclopropyl group) was alse tested in the C - H amination reaction to determine the possibility of radical mechanism. The second part is about using (diacetoxyiodo)benzene an oxidant for the oxidation of phenyl acetal compounds to form orthoesters.