SEARCH Articles Figures Tables 2- Pyrones, 4-oxy-substituted, dehydroacetic acid and related systems Abbreviated Designations of Substituted Amino Acids and Peptides Acetylene and Substituted Acetylenes in Presence of Carboxylic Acids, Hydrogen Halides, Mercaptans or Amines Acid Derivatives and Nucleophilic Acyl Substitution Reactions Acid-catalyzed additions and substitutions Acids and Their Derivatives — Nucleophilic Acyl Substitution Carboxylic Acid Derivatives and Nucleophilic Acyl Substitution Reactions Carboxylic Acids and Their Derivatives—Nucleophilic Acyl Substitution Nucleophilic acyl substitution carboxylic acids and Reactions of Carboxylic Acids and Derivatives Nucleophilic Acyl Substitution Routes to Alpha-Heteroatom-substituted Boronic Acids and Boronate Esters Substituted -Butyrolactones From Carboxylic Acids and Olefins 7-(-Octyl)-y-Butyrolactone Substitutions at the Carbonyl Group Reactions of Carboxylic Acids and Derivatives