69097-51-4Relevant articles and documents
Synthesis of (2 S,3 R,5 R)-2-Azido-3,5-dihydroxynonadecane Sphingolipid Analogue
Pemha, René,Pegnyemb, Dieudonné Emmanuel,Mosset, Paul
, p. 2572 - 2578 (2020/11/03)
A concise and highly efficient synthesis of an enigmol analogue has been achieved. The synthetic strategy features Jacobsen's hydrolytic kinetic resolution (HKR) and epoxide opening by alkynyl boranes as the key steps.
Syntheses and interfacial behaviour of neoglycolipid analogues of glycosyl ceramides
Lafont, Dominique,Bouchu, Marie-Noelle,Girard-Egrot, Agnes,Boullanger, Paul
, p. 181 - 194 (2007/10/03)
Four glycosyl ceramides analogues having D-galactose or 2-acetamido-2-deoxy-D-glucose moieties linked to enantiomeric lipids have been synthesised to study their interfacial behaviour at the air | water interface. The lipid chains were prepared in two steps by opening 1,2-epoxyhexadecane using Jacobsen kinetic hydrolytic resolution (KHR) followed by an azidosilylation reaction of the diol so obtained. Glycosylation reactions were realised either with 2,3,4,6-tetra-O-benzoyl-α-D-galactopyranosyl trichloroacetimidate or 1,3,4,6-tetra-O-acetyl-2-allyloxycarbonylamino-2-deoxy-β-D-glucopyranose as donors and (2R)- or (2S)-2-azidohexadecanol derivatives as acceptors. Transformation of the azido glycosides into N-acylated products was done by a modified Staudinger reaction in the presence of fatty acyl chlorides. The four neoglycolipids are able to form a condensed monolayer at the air | water interface; their π-A isotherm diagrams are similar to that described for the natural glycosyl ceramides. The detailed analysis of the isotherms, taking into account the chirality of the lipid chains, allowed to determine the contribution of the different parts of the molecule under the monolayer packing.
Asymmetric synthesis of (2R)- and (2S)-2-iodohexadecanal, natural inhibitors of the thyroid gland metabolism
Jacoby, Claude,Braekman, Jean-Claude,Daloze, Desire
, p. 10473 - 10484 (2007/10/03)
(2R)-(+)- and (2S)-(-)-2-iodohexadecanal 1 with ee's≤89% were synthesized in five steps and 62% overall yield from chiral enol ethers Z- and/or E-7, via the iodocyclization with ICl and chromatographic separation of the resulting diastereomeric 1'-iododioxanes 8. The ee's of (2S)- and (2R)-1 have been determined after their transformation to the (R)-O-methylmandelate esters 11 and 12 or to the epoxides (2R)- and (2S)-13, respectively. Their absolute configuration has been assigned through chemical correlation with 13 and by application of Mosher's method to the esters 15 and 16 obtained by methanolysis of (2R)- and (2S)-13, respectively, followed by derivatization. Moreover, the biosynthesis and the inhibitory activity of 1 have been shown to be unstereoselective.