Transition-Metal-Free Regioselective Thiocyanation of Triisopropylsilane(TIPS)-Protected Phenols
Arylthiocyanate compounds are crucial in organic chemistry.They have widespread applications in agrochemicals,pharmaceuticals,and materials chemistry.Herein,the transition metal-free regioselective thiocyanation of triisopropylsilane(TIPS)-protected phenol derivatives was achieved using NH4SCN as thiocyanation reagent and potassium peroxymonosul-fonate/(2KHSO5·KHSO4·K2SO4,oxone)as the oxidant.The conversion was achieved in good to excellent yields under mild reaction conditions.Further,various functional groups were well tolerated in these reaction conditions.The practicability of this method was demonstrated in the thiocyanation of bioactive molecules,such as thymol,amylcresol,and phenethyl resor-cinol.