title: Unexpected course of Beckmann rearrangement of taraxerone oxime with Ac₂O/AcOH.
abstract: The chemistry of pentacyclic taraxerane-type triterpenoids has not been extensively studied. In the course of our synthesis of nitrogen-containing heterocyclic compounds from taraxerone using Beckmann rearrangement with Ac2O/AcOH as the rearrangement agent, unexpected synthetic pathways were discovered leading to new types of modified taraxerane skeletons.
authors.affiliation: a Faculty of Chemistry , VNU University of Science, Vietnam National University, Hanoi , 19 Le Thanh Tong Street, Hanoi , Vietnam.
authors.forename: Phan Minh
authors.initials: PM
authors.lastname: Giang
authors.forename: Vu Minh
authors.initials: VM
authors.lastname: Trang
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Matsunami
authors.forename: Phan Tong
authors.initials: PT
authors.lastname: Son
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D019665:Euphorbiaceae / Q000737:chemistry*; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry; D010091:Oximes / Q000737:chemistry*
chemical_list: D010091:Oximes; D009828:Oleanolic Acid; C009379:taraxerone