Lewis Acid-Mediated Cycloaddition of
Methylenecyclopropanes with Aldehydes
and Imines: A Facile Access to Indene,
THF, and Pyrrolidine Skeletons via
Homoallylic Rearrangement Protocol
posted on 2004-04-01, 00:00authored byMin Shi, Bo Xu, Jin-Wen Huang
Methylenecyclopropanes (MCPs) <b>1</b> can react with aldehydes and aldimines to give the corresponding indene, THF, and pyrrolidine cycloaddition
products in the presence of BF<sub>3</sub>·OEt<sub>2</sub> under mild reaction conditions.