title: Diels-Alder trapping of in situ generated dienes from 3,4-dihydro-2H-pyran with p-quinone catalysed by p-toluenesulfonic acid.
abstract: This comprehensive study portrays that p-toluenesulfonic acid is a more efficient catalyst for the reaction between p-quinones and 3,4-dihydro-2H-pyran, than the Lewis acids. The products were accomplished by the Diels-Alder cycloaddition reaction and their mechanistic pathways have been formulated. The impact of C2and C2,5substituents of the p-quinones on the cycloaddition reaction has been explored. Remarkably, it is the first report to explore this kind of in situ generated diene for the Diels-Alder cycloaddition reaction.
authors.affiliation: Department of Chemistry, B.S. Abdur Rahman University, Chennai, India. easwar@bsauniv.ac.in.
authors.forename: Radhakrishnan
authors.initials: R
authors.lastname: Mohan Raj
authors.affiliation: Department of Biotechnology, Indian Institute of Technology Madras, India.
authors.forename: Kalpattu K
authors.initials: KK
authors.lastname: Balasubramanian
authors.affiliation: Department of Chemistry, B.S. Abdur Rahman University, Chennai, India. easwar@bsauniv.ac.in.
authors.forename: Deivanayagam
authors.identifier: http://orcid.org/0000-0001-6152-2468
authors.initials: D
authors.lastname: Easwaramoorthy