An Aryl to Imidoyl Palladium Migration Process Involving Intramolecular C−H Activation
作者:Jian Zhao、Dawei Yue、Marino A. Campo、Richard C. Larock
DOI:10.1021/ja070657l
日期:2007.4.1
imidoyl palladium migration, followed by intramolecular arylation. The fluoren-9-one synthesis appears to involve both a palladium migration mechanism and a C-H activation process proceeding through an unprecedented organopalladium(IV) hydride intermediate. The results from deuterium labeling experiments are consistent with the proposed dual mechanism.
Cross Dehydrogenative Coupling via Base-Promoted Homolytic Aromatic Substitution (BHAS): Synthesis of Fluorenones and Xanthones
作者:Sebastian Wertz、Dirk Leifert、Armido Studer
DOI:10.1021/ol4000857
日期:2013.2.15
Cross dehydrogenative coupling reactions occurring via base-promoted homolytic aromatic substitutions (BHASs) are reported. Fluorenones and xanthones are readily prepared via CDC starting with readily available ortho-formyl biphenyls and ortho-formyl biphenylethers, respectively. The commercially available and cheap tBuOOH is used as an oxidant. Initiation of the radical chain reaction is best achieved
PhI(OAc)<sub>2</sub>–BF<sub>3</sub>–OEt<sub>2</sub>mediated domino imine activation, intramolecular C–C bond formation and β-elimination: new approach for the synthesis of fluorenones, xanthones and phenanthridines
作者:Satinath Sarkar、Narender Tadigoppula
DOI:10.1039/c4ra06159d
日期:——
PhI(OAc)2âBF3âOEt2 mediated domino synthesis of biologically important fluorenones, xanthones and phenanthridines has been developed. The reaction proceeds through imine activation, intramolecular CâC bond formation and β-elimination.
Anti-neurodegeneratively active 10-aminoaliphatyl-dibenzi \x9bb,f! oxepines
申请人:Novartis Corporation
公开号:US05780500A1
公开(公告)日:1998-07-14
Base-substituted debenz\x9bb,f!oxepines of formula I ##STR1## wherein alk is a divalent aliphatic radical, R is an amino group that is unsubstituted or mono- or di-substituted by monovalent aliphatic and/or araliphatic radicals or disubstituted by divalent aliphatic radicals, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each, independently of the others, hydrogen, lower alkyl, lower alkoxy, halogen or trifluoromethyl, and pharmaceutically acceptable salts thereof, may be used as anti-neurodegenerative active ingredients of medicaments. The invention relates also to novel compounds of formula I.