Title: Helenynolic Acid
CAS Registry Number: 7309-58-2
CAS Name: (9S,10E)-9-Hydroxy-10-octadecen-12-ynoic acid
Molecular Formula: C18H30O3
Molecular Weight: 294.43
Percent Composition: C 73.43%, H 10.27%, O 16.30%
Literature References: From seed oil of Helichrysum bracteatum Andr., Compositae: R. G. Powell et al., J. Am. Oil Chem. Soc. 42, 165 (1965). Structure: eidem, J. Org. Chem. 30, 610 (1965). Absolute configuration: J. C. Craig et al., ibid. 4342. Partial synthesis of racemic helenynolic acid: H. R. S. Conacher, Gunstone, Lipids 5, 137 (1970). Synthesis of (±)-form: T. B. Patrick, G. F. Melm, J. Org. Chem. 44, 645 (1979).
Derivative Type: Methyl ester
Molecular Formula: C19H32O3
Molecular Weight: 308.46
Percent Composition: C 73.98%, H 10.46%, O 15.56%
Properties: uv max (isooctane): 228, 238 nm (e 17400, 14300). [a]26600 -7° (c = 3.6 in ethanol).
Optical Rotation: [a]26600 -7° (c = 3.6 in ethanol)
Absorption maximum: uv max (isooctane): 228, 238 nm (e 17400, 14300)
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