title: Chain substituted polymerizable ether lipids: synthesis of sorbyl and diacetylenic ether glycerophosphocholine.
abstract: Three novel polymerizable ether lipids, 1,2-O-bis[10(2',4'-hexadienoyloxy)decyl]-rac, 1,2-O-bis(10,12-tricosadiynyl)-rac, and (-)-2,3-O-bis(10,12-tricosadiynyl)-sn-glycero-1-phosphocholine, were synthesized from 3-O-benzyl-rac, 3-O-trityl-rac and (-)-1-O-trityl-sn-glycerol as starting materials, respectively. All the reactions employed in these multi-step syntheses are straightforward giving an overall yield of 21% for the sorbyl, 42% for the racemic diacetylenic and 44% for the chiral diacetylenic lipid. All the lipids form bilayer assemblies on hydration and show transitions from gel to liquid-crystalline phases at 11.4 degrees, 27.6 degrees and 30.0 degrees C, respectively. Bilayer assemblies of each are photoreactive and are readily polymerized by irradiation with 254 nm light. Tubules of the chiral diacetylenic ether lipid were observed.
authors.affiliation: C.S. Marvel Laboratories, Department of Chemistry, University of Arizona, Tucson 85721.
authors.forename: Y S
authors.initials: YS
authors.lastname: Lee
authors.forename: D F
authors.initials: DF
authors.lastname: O'Brien
mesh_terms: D010742:Phospholipid Ethers / Q000138:chemical synthesis*; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D010742:Phospholipid Ethers; C076779:1,2-bis(10-(2',4'-hexadienoyloxy)decyl)glycero-3-phosphocholine; C076781:1,2-bis(10,12-tricosadiynyl)glycero-3-phosphocholine; C076783:2,3-O-bis(10,12-tricosadiynyl)glycero-1-phosphocholine