title: Fluoride-induced cyclization of pentacenequinone to higher quinones.
abstract: Novel pentacenequinone derivatives 3, 7, and 10 have been synthesized via Suzuki-Miyaura coupling. Derivatives 3 and 7 having OTBS groups undergo irreversible fluoride-induced cyclization to substituted higher quinones in the presence of TBAF in dry THF using one-pot, two-step strategies in moderate yields. These functionalized higher quinone derivatives are freely soluble in THF and DMSO and can be used as precursors for the synthesis of higher acene derivatives.
authors.affiliation: Department of Chemistry, UGC Sponsored-Centre for Advance Studies-I, Guru Nanak Dev University, Amritsar-143005, Punjab, India. vanmanan@yahoo.co.in
authors.forename: Vandana
authors.initials: V
authors.lastname: Bhalla
authors.forename: Ankush
authors.initials: A
authors.lastname: Gupta
authors.lastname: Roopa
authors.forename: Hardev
authors.initials: H
authors.lastname: Singh
authors.forename: Manoj
authors.initials: M
authors.lastname: Kumar