Isolation and structural determination of the C 20  and C 22  unsaturated fatty acids of rapeseed oil | Zendy

Haeffner E. W. | Zendy

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Isolation and structural determination of the C 20 and C 22 unsaturated fatty acids of rapeseed oil

Author(s) -

Haeffner E. W.

Publication year - 1970

Publication title -

lipids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.601

H-Index - 120

eISSN - 1558-9307

pISSN - 0024-4201

DOI - 10.1007/bf02532110

Subject(s) - rapeseed , polyunsaturated fatty acid , chemistry , fatty acid , clinical chemistry , lipidology , cis–trans isomerism , erucic acid , unsaturated fatty acid , stereochemistry , organic chemistry , food science , biochemistry

Polyunsaturated C 20 and C 22 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 the cis Δ‐13 isomer only. Evidence is also given for the presence of a 24∶1 acid.

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