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Curupira tefeensis II: Occurrence of Acetylenic Fatty Acids by V. Spitzer; F. Marx; J. G. Maia; K. Pfeilsticker is a Agricultural and Biological Sciences article available to read on EtoBox.

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Four acetylenic fatty acids [ll-octadecen-9-ynoic acid (E) (ximenynic acid), 11-octadecen-9-ynoic acid (Z), 9,Il-octadecadiynoic acid and 13-octadecen-9,ll-diynoic acid (E) (exocarpic acid)] were found in the seed oil of Curupiru &fcmFis (Olacaceae) as minor compounds. The mass spectra of the methyl esters (EI and C1 mode), picoliiyl esters and 4,4-dimethyloxazoline derivatives of these acids are discussed in detail. Furthermore the NMR data of 9,ll-octadecadiynoic acid and 13-octadecen-9,lI-diynoic acid are presented. ## I n t r o d u c t i o n In our previous paper1 about the composition of the seed oil of Curupira tefeeenris, Black n.sp. (Olacaceae) we concluded from the W spectrum the occurrence of approx. 1.2% acetylenic fatty acids but their structures were not identified. Now the eludication of the structure of four conjugated acetylenic fatty acids is described. Futhermore, different derivatization methods which are known to be useful for the mass spectroscopical localization of isolated double and triple bonds of fatty acids are tested for conjugated systems. The results are discussed. ## E x p e r i m e n t a l Material: Fruits of Curupira tgeensis were collected in the r

Who reads Curupira tefeensis II: Occurrence of Acetylenic Fatty Acids?

Author

V. Spitzer; F. Marx; J. G. Maia; K. Pfeilsticker

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley (ISSN 0931-5985)

Published

1991

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)