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      Novel Di-, Tri- and Teraenoic Fatty Acids with bis-Methylene-Interrupted Double-Bond Systems from the Sponge Haliclona cinerea = 海綿 Haliclona cinerea에 存在하는 特異한 bis-methylene-interrupt 三重結合 構造를 가진 diene, triene 및 tetraene 脂肪酸에 관하여

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      https://www.riss.kr/link?id=A40016992

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      Unusual fatty acids, with up to 34 carbon atoms and containing one or two bis-methylene-interrupted double-bond systems, have been identified in the sponge Haliclona cinerea from the Black Sea. These include the dienes-5, 9-16:2, 7, 11-18:1, 9, 13-20:2, 13, 17-24:2, 15, 19-26:2, 17, 21-28:2, 19, 23-30:2 and 21, 25-32:2; trienes- 5, 9, 23-30:3, 5, 9, 24-31:3, 5, 9, 23, 27-34:4. In addition, 5, 9, 13-eicosatrienoic acid was present. Many of these do not appear to have been described before, and only 5, 9-16:2 and 5, 9, 23-30:3 are found often in sponges. They were identified by using silver-ion high-performance liquid chromatography to simplify the complex mixture of fatty acids of subsequent analysis by gas chromatography-mass spectrometry as pico-linyl ester derivatives. Deuteration with Wilkinson's catalyst in homogeneous solution confirmed the structures. We speculate that the di- and tetraenoic fatty acids arise by chain elongation of 5, 9-hexadecadienoic acid, also a major component of the lipids, followed by further insertion of double bonds in the 5 and 9 positions. The trienes may be formed from 9-hexadecenoic acid by similar mechanisms.
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      Unusual fatty acids, with up to 34 carbon atoms and containing one or two bis-methylene-interrupted double-bond systems, have been identified in the sponge Haliclona cinerea from the Black Sea. These include the dienes-5, 9-16:2, 7, 11-18:1, 9, 13-20:...

      Unusual fatty acids, with up to 34 carbon atoms and containing one or two bis-methylene-interrupted double-bond systems, have been identified in the sponge Haliclona cinerea from the Black Sea. These include the dienes-5, 9-16:2, 7, 11-18:1, 9, 13-20:2, 13, 17-24:2, 15, 19-26:2, 17, 21-28:2, 19, 23-30:2 and 21, 25-32:2; trienes- 5, 9, 23-30:3, 5, 9, 24-31:3, 5, 9, 23, 27-34:4. In addition, 5, 9, 13-eicosatrienoic acid was present. Many of these do not appear to have been described before, and only 5, 9-16:2 and 5, 9, 23-30:3 are found often in sponges. They were identified by using silver-ion high-performance liquid chromatography to simplify the complex mixture of fatty acids of subsequent analysis by gas chromatography-mass spectrometry as pico-linyl ester derivatives. Deuteration with Wilkinson's catalyst in homogeneous solution confirmed the structures. We speculate that the di- and tetraenoic fatty acids arise by chain elongation of 5, 9-hexadecadienoic acid, also a major component of the lipids, followed by further insertion of double bonds in the 5 and 9 positions. The trienes may be formed from 9-hexadecenoic acid by similar mechanisms.

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      목차 (Table of Contents)

      • Ⅰ. MATERIALS AND METHODS
      • Ⅱ. RESULTS AND DISCUSSION
      • Ⅲ. ACKNOWLEDGMENTS REFERENCES
      • Ⅰ. MATERIALS AND METHODS
      • Ⅱ. RESULTS AND DISCUSSION
      • Ⅲ. ACKNOWLEDGMENTS REFERENCES
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