title: Synthesis of unsaturated phosphatidylinositol 4,5-bisphosphate and analogues.
abstract: A new approach for the synthesis of phosphatidylinositol 4,5-bisphosphate [PtdIns(4,5)P2] is described, compatible with unsaturated fatty acid esters, as well as phosphorothioate and acetylenic analogues. This strategy depends on masking the phosphate charges with base-labile cyanoethyl esters, and the hydroxyls of the target with mild acid-labile protecting groups. A two-step basic then acidic global unblocking of orthogonal protecting groups provides the target lipid. A xanthenylidene acetal was used for key temporary protection of the 4,5-diol, and the 6-O was protected with a 1-(4-chlorophenyl)-4-ethoxypiperidin-4-yl (Cpep) acetal.
authors.affiliation: Department of Chemistry, Imperial College, Exhibition Road, London, UK SW7 2AZ.
authors.forename: Nitesh
authors.initials: N
authors.lastname: Panchal
authors.forename: Piers R J
authors.initials: PR
authors.lastname: Gaffney
mesh_terms: D008968:Molecular Conformation; D019269:Phosphatidylinositol 4,5-Diphosphate; D018129:Phosphatidylinositol Phosphates / Q000138:chemical synthesis* / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D019269:Phosphatidylinositol 4,5-Diphosphate; D018129:Phosphatidylinositol Phosphates