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New long‐chain hydroxy acids from Grevillea decora
Author(s) -
Kleiman R.,
Wolf R. B.,
Plattner R. D.
Publication year - 1985
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/bf02534205
Subject(s) - double bond , chemistry , long chain , carbon fibers , stereochemistry , organic chemistry , botany , biology , polymer science , materials science , composite number , composite material
In addition to the ω‐5 olefinic acids found in other Grevillea species, about 10% of the acyl groups of G. decora seed oil contain a hydroxy group and an ω‐5 double bond. The chainlengths of these acids are from C 22 to C 30 , with the largest concentration at the C 26 and C 28 chainlengths. The hydroxy group is located on odd carbons from carbon‐5 through carbon‐13. These acids previously were unknown in nature. The most abundant of these are 7‐hydroxy‐ cis ‐17‐docosenoic, 7‐hydroxy‐ cis ‐19‐tetracosenoic, 9‐hydroxy‐ cis ‐19‐tetracosenoic, 9‐hydroxy‐ cis ‐21‐hexacosenoic, 11‐hydroxy‐ cis ‐21‐hexacosenoic, and 13‐hydroxy‐ cis ‐23‐octacosenoic acids. The oil also contains the largest known concentration of the unoxygenated C 26 and C 28 ω‐5 monoenes.