title: Trisannelation of acrylates to 1,3,5-benzenetricarboxylates by a Pd(OAc)2/HPMoV/CeCl3/O2 system.
abstract: A new type of trisannelation reaction of acrylates through acetal formation was developed by Pd(OAc)2 combined with molybdovanadophosphoric acid (HPMo8V4) and Lewis acid under atmospheric dioxygen. Thus, the reaction of isobutyl acrylate in the presence of Pd(OAc)2, HPMo8V4, and CeCl3 under O2 (1 atm) in MeOH/AcOH afforded isobutyl 1,3,5-benzenetricarboxylate in fair yield. The reaction was found to proceed through the palladium-catalyzed acetalization of acrylate with methanol followed by the trisannelation reaction of the resulting acetal promoted by CeCl3.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering & High Technology Research Center, Kansai University, Suita, Osaka 564-8680, Japan.
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Tamaso
authors.forename: Yuji
authors.initials: Y
authors.lastname: Hatamoto
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sakaguchi
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Obora
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Ishii