## Abstract A method is described for the preparation of silver benzyl __N‐t__‐butyloxycarbonyl‐2‐aminoethyl phosphate. A reaction between this substance and γ‐palmitoyl‐β‐linoleoylglycerol‐L‐α‐iodohydrin, after removal of the protecting groups, furnished γ‐palmitoyl‐β‐linoleoyl‐L‐α‐phosphatidyleth
On the synthesis of mixed-acid L-α-phosphatidylethanolamines
✍ Scribed by F. J. M. Daemen; G. H. de Haas; L. L. M. van Deenen
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 549 KB
- Volume
- 81
- Category
- Article
- ISSN
- 0165-0513
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✦ Synopsis
Abstract
The synthesis is described of phosphatidylethanolamine, involving a reaction between γ,β‐diacylglycerol‐L‐α‐iodohydrins and silver benzyl 2‐ phthalimidoethylphosphate. A comparison has been made between (γ‐oleoyl‐β‐stearoyl)‐L‐α‐phosphatidylethanolamine, obtained by this method and (γ‐oleoyl‐β‐stearoyl)‐L‐α‐phosphatidylethanolamine and the structurally isomeric (β‐oleoyl‐γ‐stearoyl)‐L‐α‐phosphatidylethanolamine, both synthesized by a different procedure, previously reported^2^. The structural identity of the two former compounds was proved by degradation experiments with the β‐fatty acid releasing phospholipase from snake venom. In addition, some physical properties of the enzymatically formed Iysophosphatidylethanolamine have been compared with those of a corresponding lyso compound and a glycol derivative, both synthesized by the method indicated.
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A high-yielding procedure for the semisynthesis of mixed-chain phosphatidylethanolamines is described. The key finding is that the reacylation of an N-tBOC-lysophosphatidylethanolamine methyl esterwith a carboxylic acid can be achieved in high yield with DCC and DMAP. Deprotection of the phosphate a
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3tP-NMR, small angle X-ray scattering and DSC techniques show that in aqueous dispersions of dielaidoylphosphatidylethanolamine, incorporation of dielaidoylphosphatidic acid causes bilayer stabilization, most likely due to interbilayer repulsive electrostatic forces. The results further indicate tha