Abstract
We have investigated the conditions required to obtain a quantitative yield of methyl esters from cholesteryl esters by alkaline methanolysis. Methanolysis of the cholesteryl ester for 60 min at room temperature with 1 m methoxide reagent ensured complete reaction. Some ester hydrolysis always accompanied methanolysis and necessitated acid-catalyzed methylation of the resultant fatty acids after completion of the alcoholysis. Analysis of the composition of methyl ester product and remaining cholesteryl ester substrate before methanolysis had gone to completion showed selective hydrolysis of some fatty acid cholesteryl esters and illustrates the importance of obtaining a quantitative yield of methyl esters following methanolysis.
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