- Mechanistic investigation of the isomerization of 5-vinyl-2-norbornene.
Mechanistic investigation of the isomerization of 5-vinyl-2-norbornene.
The Journal of organic chemistry (2006-01-28)
Hoon Sik Kim, So Young Lee, Hyunjoo Lee, Jin Young Bae, Sang Joon Park, Minserk Cheong, Je Seung Lee, Chang-Ha Lee
PMID16438500
초록
The isomerization reaction of 5-vinyl-2-norbornene (VNB) to 5-ethylidene-2-norbornene (ENB) has been performed using a catalytic system consisting of an alkali metal hydride and an amine. Among various amines tested, only aliphatic 1,2-diamines exhibited the activity for the isomerization. The isomerization was also affected by the alkali metal hydride employed. The activity of the alkali metal hydride increased with the increasing size of alkali metal: KH > NaH > LiH. A series of electron paramagnetic resonance (EPR) and UV-vis experiments on the active species suggest that the isomerization of VNB proceeds through a radical mechanism.
MATERIALS
제품 번호
브랜드
제품 설명
Sigma-Aldrich
5-Vinyl-2-norbornene, mixture of endo and exo, 95%, contains 80-150 ppm BHT as inhibitor