(PEG)-lipid conjugates and methods of preparation are disclosed herein. Methods of preparation may involve stepwise addition of small PEG oligomers to a glycerol backbone until a desired chain size is attained. Polymers resulting from the syntheses may be highly monodisperse. The resulting polymers may comprise branched polyethyleneglycol (PEG)-lipid conjugates. The present disclosure may provide several advantages such as simplified synthesis, high product yield and low cost for starting materials. The present synthesis method may be suitable for preparing a wide range of conjugates such as PEG lipid conjugates having a glycerol-like central backbone covalently attached to two or more monodisperse PEG chains and a lipid comprising a range of diesters made from fatty acids or bile acids.
An operationally simple and environmentally benign protocol for a highly regio‐ and chemoselective preparation of β‐substituted alcohols by means of ring‐opening reactions of oxiranes with various aliphatic alcohols, H2O, NaN3, and NaCN as nucleophiles in the presence of catalytic amounts of zirconium tetrakis(dodecyl sulfate) as Lewis acid/surfactant‐combined catalysts (LASCs) was developed. The high