Unveiling the Structure and Reactivity of Fatty-Acid Based (Nano)materials Thanks to Efficient and Scalable <sup>17</sup>O and <sup>18</sup>O-Isotopic Labeling Schemes
certain metal cations or materials surfaces. In this context, we have developed novel, efficient, user-friendly, and cost-effective synthetic protocols based on ball-milling, for the 17O and 18O isotopic labeling of two key fatty acids which are widely used in (nano)materials science, namely stearic and oleic acid. Labeled molecules were analyzed by 1H and 13C solution NMR, IR spectroscopy, and mass spectrometry
Total synthesis of mololipids: A new series of anti-HIV Moloka'iamine derivatives
作者:Ryan C. Schoenfeld、Jean-Philip Lumb、Jacques Fantini、Bruce Ganem
DOI:10.1016/s0960-894x(00)00543-6
日期:2000.12
A new family of bioactive bromotyrosine derivatives, termed mololipids, was recently isolated from a Hawaiian sponge, but could not be resolved into individual components by chromatography. To complete their structural characterization and better understand structure-activity relationships, the first pure samples of dimyristoyl, distearoyl, dioleoyl, and stearoyl/oleoyl mololipids have now been prepared
We report a simple and efficient glutathione acylation reaction for the chemoselective synthesis of S- or N-acylated glutathione derivatives, under mild conditions and using water as the solvent, by means of the in-situ formation of acylimidazole electrophiles from the respective abundant carboxylic acid.
1,2-Diricinoleoyl- and 1-ricinoleoyl-2-oleoyl-sn-glycero-3-phosphocholine were synthesised with good yields, The synthesis started with the preparation of ricinoleic acid from castor oil. The choice of a suitable agent to protect the -OH group of ricinoleic acid was a key factor to afford the final products. Several protecting groups were assayed but only beta -methoxyethoxymethyl chloride (MEMCl) and 2,2,2-trichloroethyl chloroformate (TRECCl) gave reasonable yields and good optical purities of the final products. The overall yields for 1,2-diricinoleoyl-sn-glycero-3-phosphocholine and 1-ricinoleoyl-2-oleoyl-sn-glycero-3-phosphocholine were 32.1% (with respect to ricinoleic acid methyl ester using TREC as protecting group) and 10.3% (with respect to 1-trityl-glycero-3-phosphochofine), respectively. (C) 2001 Elsevier Science Ltd. All rights reserved.