SEARCH Articles Figures Tables Acetals and ketals, cyclic monothio, to protect carbonyl groups Acetals and ketals, cyclic to protect carbonyl groups Acetals and ketals, cyclic to protect catechols Acetals and ketals, cyclic to protect diols Cyclic boronates, to protect 1,2- and 1,3-diols Cyclic esters to protect catechols Cyclic esters to protect diols Other Cyclic and Bicyclic Protecting Systems for Sialyl Donors Protecting groups cyclic acetals Synthesis of Cyclically Protected Side Chains