SEARCH Articles Figures Tables Acetals and ketals, cyclic 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 Carbon cyclic ketal Cyclic ketal, seven-membered Cyclic ketals Cyclic monothio acetals and ketals Hemi-acetals and -ketals, cyclic Hemi-acetals and -ketals, cyclic s. Lactols Reaction of Cyclic Ketals with Carbon Dioxide