Palladium-catalyzed norbornene-carbon monoxide co-oligomerization initiated by aryl groups and terminated by double bond formation
摘要:
The use of m-iodophenol as initiator in palladium-catalyzed norbornene-carbon monoxide oligomerization in the presence of potassium acetate unexpectedly leads to termination by double bond formation in spite of the limitations to beta-H-anti elimination. The presence of endo products points to preliminary exo-to-endo isomerization through enolization. The X-ray structure of one stereoisomer (Ia) is given.