Mirko Einzmann and Wolfgang H. Binder
The initiating behavior of the functional tosylates 1–4 and triflates 5 and 6 for the cationic ring-opening polymerization of 2-methyl-1,3-oxazoline was investigated. The emphasis was directed at tosylates and triflates with 2,2-dimethyl-1,3-dioxolane-, 2,3-epoxypropyl-, 2,3-didodecanoyl-glycerol-, and cholest-5-en-moieties that allow the construction of amphiphilic polyoxazoline conjugates. 2,2-Dimethyl-(4-trifluoromethanesulfonyloxymethyl)-1,3-dioxolane 6 gave the best results in respect to molecular weight and polydispersity. Starting from functional oxazoline polymers obtained with 6 as an initiator, amphiphilic lipid-polyoxazoline conjugates with a diacylglycerol backbone could be prepared.