5-Norbornene-2-carboxylic acid → 2-Maleimidylethanol t-butyl 5-norbornene-2-carboxylate 2-hydroxyethyl-5-norbornene-2-carboxylate 5-norbornene-2-carboxylic acid

Participants

Reaction Steps

2-Maleimidylethanol (12) (0.5 to 1 mol), 0.1 to 1 mol of t-butyl 5-norbornene-2-carboxylate (19), 0.05 to 1 mol of 2-hydroxyethyl 5-norbornene-2-carboxylate (21), and 0.01 to 0.3 mol of 5-norbornene-2-carboxylic acid (20) were dissolved in 150 to 250 g of THF solvent to which was added 0.5 to 20 g of AIEN as a polymerization initiator. The reaction mixture was allowed to react at 60° C. to 75° C. for 4 to 24 hours under an argon atmosphere. The resulting crude resin was precipitated with ethyl ether and dried to obtain poly[2-maleimidylethanol/t-butyl 5-norbornene-2-carboxylate/2-hydroxyethyl-5-norbornene-2-carboxylate/5-norbornene-2-carboxylic acid] copolymer resin.

Provenance & Evidence