ACYL GROUP MIGRATIONS IN 2-MONOOLEIN

Acyl migration in 2-monoolein dissolved in solvents under conditions c ommon in lipid modification reactions has been studied. The effects on acyl migration of solvent, incubation temperature, water activity, po lar additives and solid additives have been investigated. Extensive ac yl migration occured in aliphatic hydrocarbons and water-miscible alco hols under dry conditions. The acyl migration rate could be decreased in several nonpolar solvents by adding a small amount of water or an a lcohol. Increasing water activity had no effect in isooctane, but decr eased the acyl migration rate dramatically in methyl tert-butyl ether and methyl isobutyl ketone. Several commonly used enzyme supports cata lysed acyl migration, showing that supports with surface charges could catalyse acyl migration.