Intramolecular reactions of borates: access to chiral alkenylboranes
Abstract
Chiral alkenyl-(N-azolyl)boranes (3), (4) are obtained in high yield from the reaction between (E)-2-dimethyl(chloro)stannyl-3-diethylborylpent-2-ene (1), readily available via 1,1-organoboration, and N-pyrrolyl- or N-indolyl-lithium in hexane.