Two novel naturally occurring alpha-methoxy acids from the phospholipids of two Caribbean sponges.
The novel (5Z)-2-methoxy-5-hexadecenoic acid (1) was identified in the phospholipids of the sponge Tethya crypta while the also novel acid (6Z)-2-methoxy-6-hexadecenoic acid (2) was found in the phospholipids of the Caribbean sponge Spheciospongia cuspidifera. The methoxy-fatty acids were mainly associated with phosphatidylethanolamine. The double bond positions were determined by gas chromatography/mass spectrometry on the corresponding dimethyl-disulfide adducts and the double bond stereochemistry was ascertained by gas chromatography/Fourier transform infrared spectroscopy. The fatty acid composition of the two sponges is reported.
Carballeira
N M
NM
Department of Chemistry, University of Puerto Rico, Rio Piedras 00931.
Sepúlveda
J A
JA
D000818:Animals; D005231:Fatty Acids, Unsaturated / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D010714:Phosphatidylethanolamines / Q000737:chemistry*; D011161:Porifera / Q000737:chemistry*
D005231:Fatty Acids, Unsaturated; D010714:Phosphatidylethanolamines