Maleic Anhydride → 2-Hydroxyethyl oxabicyclo[2,2,1]hept-5-ene-2-carboxylate t-butyl 5-norbornene-2-carboxylate 5-norbornene-2,3-dicarboxylic acid maleic anhydride

Participants

Reaction Steps

2-hydroxyethyl oxabicyclo[2,2,1]hept-5-ene-2-carboxylate (0.1 mol), t-butyl 5-norbornene-2-carboxylate (0.85 mol), 5-norbornene-2,3-dicarboxylic acid (0.05 mol) and maleic anhydride (1 mol) were dissolved in a tetrahydrofuran solvent (200 g). 2,2-azobisisobutyonitrile (5.84 g) was added, and the solution was mixed. The solution was polymerized at a temperature of 67° C. in a nitrogen atmosphere for 10 hours. After the polymerization reaction was completed, the polymer was precipitated in an ethyl ether solvent, then dried in a vacuum to obtain the pure title polymer (87.627 g). (yield: 30%, purity: 99.9%).

Provenance & Evidence