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Isolation and structural determination of the C20 and C22 unsaturated fatty acids of rapeseed oil

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Lipids

Abstract

Polyunsaturated C20 and C22 fatty acids, which seldom are found in the triglycerides of higher plants, were isolated from rapeseed oil and their structures fully characterized. Pure 20∶2 and 20∶3 were identified as all-cis Δ-11,14 and all-cis Δ-11,14,17. Pure 22∶2 and 22∶3 were characterized as all-cis Δ-13,16 and all-cis Δ-13,16,19. Trienoic acids were found in very small amounts. Reinvestigation of the 20∶1 acid showed that it is a mixture of 75%cis Δ-11 and 25%cis Δ-13, whereas the 22∶1 is thecis Δ-13 isomer only. Evidence is also given for the presence of a 24∶1 acid.

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Author notes

  1. E. W. Haeffner

    Present address: The Hormel Institute, University of Minnesota, 55912, Austin, Minn.

Authors and Affiliations

  1. Institute of Physiological Chemistry, University of Cologne, Cologne, Germany

    E. W. Haeffner

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  1. E. W. Haeffner
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Additional information

Extract from the doctoral dissertation of E. W. Haeffner, Department of Mathematics and Natural Sciences, University of Cologne, 1965.

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Haeffner, E.W. Isolation and structural determination of the C20 and C22 unsaturated fatty acids of rapeseed oil. Lipids 5, 430–433 (1970). https://doi.org/10.1007/BF02532110

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  • DOI: https://doi.org/10.1007/BF02532110

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