Reaktion #2063070

Reaktionsgleichung

2,2′-azobisisobutyronitrile

Ethyl maleimide

t-butyl 5-norbornene-2-carboxylate

2-hydroxyethyl 5-norbornene-2-carboxylate

→

ethyl maleimide t-butyl 5-norbornene-2-carboxylate 2-hydroxyethyl 5-norbornene-2-carboxylate

Ausbeute 85.0%

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe resulting solution was reacted at a temperature between 60° C. and 70° C. in a nitrogen atmosphere for 10 hours
2. 2
   SonstigeAfter a high molecular weight was achieved by the reaction
3. 3
   Sonstigethe resultant product was precipitated in an ethyl ether or hexane solvent
4. 4
   SonstigeThe gathered precipitate was dried
5. 5
   Sonstigewas obtained at a yield of about 85%

Vorschrift

Ethyl maleimide (1 mol.), t-butyl 5-norbornene-2-carboxylate (0.5 mol.) and 2-hydroxyethyl 5-norbornene-2-carboxylate (0.5 mol) were dissolved in 50 g to 300 g of tetrahydrofuran (THF), 2 g to 15 g of 2,2′-azobisisobutyronitrile (AIBN) was added thereto, and the resulting solution was reacted at a temperature between 60° C. and 70° C. in a nitrogen atmosphere for 10 hours. After a high molecular weight was achieved by the reaction, the resultant product was precipitated in an ethyl ether or hexane solvent. The gathered precipitate was dried, and the desired poly(ethyl maleimide/t-butyl 5-norbornene-2-carboxylate/2-hydroxyethyl 5-norbornene-2-carboxylate) polymer was obtained at a yield of about 85%. NMR spectra of the polymer is illustrated in FIG. 2.

Quelle