SEARCH Articles Figures Tables A-Heteroatom-substituted hydroxamic esters A-heteroatom-substituted aldehyde A-heteroatom-substituted amides A-heteroatom-substituted carbonyl A-heteroatom-substituted organolithiums Carbonyl compounds a-heteroatom-substituted Enolates a-heteroatom-substituted Heteroatom substitution Heteroatom-substituted Substitution heteroatom-substituted