mechanochemical procedures for 17O/18O-isotope labeling of fatty acids are reported: a carboxylicacid activation/hydrolysis approach and a saponification approach. The latter route allowed first-time enrichment of important polyunsaturated fatty acids (PUFAs) including docosahexaenoic acid (DHA). Overall, a total of 9 pure labeled products were isolated in high yields (≥80%) and with high enrichment levels
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
Covalent Grafting of Hydrophobic Substances on Collagen
申请人:Gagnieu Christian
公开号:US20070260299A1
公开(公告)日:2007-11-08
A hydrophobic grafted collagen, a method for preparing same and use thereof, in particular in therapy, are provided. Hydrophobic substances or molecules are grafted by covalent bonds on reactive amino acid residues of collagen molecules. The chemical linkages serve to modify the physico-chemical and biological properties of collagen and/or its derivatives. In particular, the introduction of hydrophobic residues enable the hydrophilic character of collagen to be modulated and its chemotactic properties involved in cell adhesion and growth to be modified.
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.