title: Tandem intramolecular Nicholas and Pauson-Khand reactions for the synthesis of tricyclic oxygen-containing heterocycles.
abstract: [reaction: see text] Simple acyclic enynes can be easily converted into tricyclic ethers upon treatment with Co2(CO)8 followed by Nicholas and Pauson-Khand reactions. Tricyclic [5,8,5]- and [5,7,5]-systems can be prepared in high overall yields in only seven synthetic steps.
authors.affiliation: Department of Chemistry, Smith College, Northampton, Massachusetts 01063, USA.
authors.forename: Miriam M
authors.initials: MM
authors.lastname: Quintal
authors.forename: Kristina D
authors.initials: KD
authors.lastname: Closser
authors.forename: Kevin M
authors.initials: KM
authors.lastname: Shea