title: An efficient synthesis of dihydro- and tetrahydropyrans via oxonium-ene cyclization reaction.
abstract: An efficient method has been developed for the synthesis of 2,3-dihydropyrans and 4-methylenetetrahydropyrans from aldehydes and substituted homoallyl alcohols in benzene mediated by boron trifluoride etherate in good yields. The reaction proceeds via oxonium-ene reaction.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
authors.forename: Somasekhar
authors.initials: S
authors.lastname: Bondalapati
authors.forename: Udagandla C
authors.initials: UC
authors.lastname: Reddy
authors.forename: Pipas
authors.initials: P
authors.lastname: Saha
authors.forename: Anil K
authors.initials: AK
authors.lastname: Saikia