SEARCH Articles Figures Tables 2- phenyl protection Acetal and ketal Acetal group Acetal-protected carbonyls Acetals O- Acetals and ketals Acetals carbonyl group protection Acetals ketals Acetals methylation Acetals, protection Acetate groups Acetate methyl group Acetates methylated Acetic carbonylation Acetic phenyl Acetous group Carbonyl group protection Carbonyl groups acetalization Carbonyl methylation Carbonyl-protecting groups, acetals Ketal protecting group Ketals carbonyl group protection Methyl acetals Methyl acetate Methyl acetate carbonylation Methyl carbonylation Methyl group Methyl phenyl-acetate O phenylation O- phenyl O-Carbonylation O-Methyl groups O-Methyl-S-phenyl acetals and ketals O-acetates O-protection O„ groups Phenyl acetate Phenyl group Protecting group ketals Protecting groups acetals Protection carbonyls Protective groups acetal S-Methylation S-Protecting groups S-Protective group S-methyl acetate