Several novel, mannose‐cholesterol conjugates for use in targeted liposomal drug delivery were synthesized via a modular strategy utilizing the Cu(I)‐catalysed Huisgen azide‐alkyne cycloaddition (“Click”) reaction. The conjugates, which were fully characterized, comprised either a single mannose unit or a trivalent mannose cluster joined to cholesterol via bifunctional PEG‐based linkers of different lengths. The neutral conjugates offer advantages over a previously reported cationic conjugate and the modular strategy employed can be readily adapted for the preparation of conjugates with alternative targeting groups.
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