Knothe, Gerhard and Rashid, Umer and Yusup, Suzana and Anwar, Farooq (2011) Fatty Acids of Thespesia populnea. Mass Spectrometry of Picolinyl Esters of Cyclopropene Fatty Acids. [Citation Index Journal] (In Press)
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Abstract
Thespesia populnea belongs to the plant family of Malvaceae which contain cyclopropane and cyclopropene fatty acids. However, previous literature reports vary regarding the content of these compounds in Thespesia populnea seed oil. In this work, the content of malvalic acid (8,9-
methylene-9-heptadecenoic acid) in the fatty acid profile of Thespesia populnea seed oil was approximately 7% by gas chromatography. Two cyclopropane fatty acids were identified, including dihydrosterculic acid. The methyl and picolinyl esters of Thespesia populnea seed oil were also prepared. The mass spectrum of picolinyl malvalate was more closely investigated, especially an ion at m/e 279, which does not fit the typical series of ions observed in picolinyl esters. It is shown that this ion is caused by cleavage at the picolinyl moiety and contains the
fatty acid chain without the picolinyl moiety. This type of cleavage has previously not been observed prominently in picolinyl esters and may therefore be diagnostic for picolinyl esters of cyclopropene fatty acids. The NMR spectra of Thespesia populnea methyl esters are also
discussed.
Item Type: | Citation Index Journal |
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Impact Factor: | 1.831 |
Subjects: | T Technology > TP Chemical technology |
Departments / MOR / COE: | Research Institutes > Green Technology |
Depositing User: | Assoc Prof Dr Suzana Yusup |
Date Deposited: | 30 May 2011 13:11 |
Last Modified: | 19 Jan 2017 08:22 |
URI: | http://scholars.utp.edu.my/id/eprint/5561 |