title: Highly regio-, chemo- and diastereoselective synthesis of oxa-bridged spirocycles: a novel observation of reverse selectivity.
abstract: The reverse regio- and diastereoselectivities are observed between the reactions involving 5- and 6-membered-ring cyclic carbonyl ylide dipoles with alpha-methylene ketones. A mild catalytic route to synthesize spirocyclic systems with high regio-, chemo- and diastereoselectivities is described.
authors.affiliation: Central Salt and Marine Chemicals Research Institute (CSIR), Bhavnagar 364 002, India. muthu@csmcri.org
authors.forename: Sengodagounder
authors.initials: S
authors.lastname: Muthusamy
authors.forename: Janagiraman
authors.initials: J
authors.lastname: Krishnamurthi
authors.forename: Munirathnam
authors.initials: M
authors.lastname: Nethaji