Cooligomers from morpholine-2,5-dione and para-dioxanone and catalyst complex SnOct2/2-hydroxyethyl sulfide

Abstract Complexes from catalysts and initiator can be used to insert a specific number of additional chemical functional groups in (co)polymers prepared by ring-opening polymerization (ROP) lactones. We report on the synthesis cooligomers sec -butyl-morpholine-2,5-dione (SBMD) para -dioxanone (PDX) ROP with varied feed ratios bulk using catalyst complex SnOct 2 /2-hydroxyethyl sulfide. M n (determined GPC) decreased decreasing SBMD ratio 4200 ± 420 800 80 g mol −1 . When was reduced 50 mol% molar 1 H-NMR) remained nearly unchanged between 81 86 attributed higher reactivity SBMD. This assumption confirmed fractionation GPC, which an increase increasing molecular weight observed. The catalyst/initiator system provides high potential create orthogonal building blocks cleavage sulfide bond. Graphic abstract