Ethylene glycol 2-Ethylhexanoic acid

A reactor was charged with 100 ml of toluene, 6,6-dimethyl-l,4-dioxane-2,5-dione (0.138 mol), poly(ethylene-glycol) (0.00578 mol 1000 Da), and tin(II)-2-ethyl-hexanoate (90% in 2-ethylhexanoic acid (0.141 mmol) and then refluxed for 24 hours using a Soxhlet extractor. The mixture was then cooled and concentrated. 

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