Cyclization Reactions of Oxyallyl Cation. A Method for Cyclopentane Ring Formation.
Bojan VulovicMilena TrmcicRadomir MatovicRadomir N SaicicPublished in: Organic letters (2019)
Unsaturated oxyallyl cations with a suitably positioned alkene bond undergo 5-exo-cyclization with the formation of vinylcyclopentane derivatives. Alkyne analogues provide allenes. The reaction proceeds with a moderate to excellent level of stereoselectivity and allows for asymmetric induction in the reaction with chiral substrate.