19897-44-0Relevant articles and documents
Diterpenoid carboxylic acid anhydrides of the abietane, pimarane, and isopimarane series
Bardyshev
, p. 41 - 55 (2007/10/03)
Methods were developed for preparation of diterpenoid carboxylic acid anhydrides of the abietane, pimarane, and isopimarane series, the corresponding mixed anhydrides, and mixed anhydrides derived from resin acids and organic or inorganic acids. The resulting anhydrides sharply differ from the parent acids in physical properties; their thermal reactions and isomerizations and the rates of formation and hydrolysis were studied. The data obtained were used to develop new procedures for separation of anhydride mixtures into pure components. Reactions of abietic anhydride with some nucleophilic reagents gave the corresponding esters, ketones, amides, etc. Commercial samples of pine wood resins (gum rosin and tallic rosin) were shown to contain a small amount (0.2%) of diterpenoid anhydride mixtures.