Bidirectional Elongation Strategy Using Ambiphilic Radical Linchpin for Modular Access to 1,4-Dicarbonyls via Sequential Photocatalysis
作者:Akira Matsumoto、Natsumi Maeda、Keiji Maruoka
DOI:10.1021/jacs.3c05337
日期:2023.9.20
electrophilic carbon-centered radical source. The stepwise and controllable generation of these radical intermediates allows sequential photocatalysis involving two mechanistically distinct radical additions, both of which are initiated by the same photocatalyst in one pot with high functional group tolerance. The methodology enables a bidirectional assembly of the linchpin with two electronically differentiated
Preparations and reactions of symmetrical dimethylenebiphenyl dianions; conformations of [O.n]-o-cyclophanes. A simple NMR method for determining twist angles in biphenyls
作者:Robert B. Bates、Fernando A. Camou、Vinayak Kane、Prasana K. Mishra、Kessara Suvannachut、James J. White
DOI:10.1021/jo00263a011
日期:1989.1
Iron‐Catalyzed Wacker‐type Oxidation of Olefins at Room Temperature with 1,3‐Diketones or Neocuproine as Ligands**
Herein, we describe a convenient and general method for the oxidation of olefins to ketones using either tris(dibenzoylmethanato)iron(III) [Fe(dbm)3] or a combination of iron(II) chloride and neocuproine (2,9-dimethyl-1,10-phenanthroline) as catalysts and phenylsilane (PhSiH3) as additive. All reactions proceed efficiently at room temperature using air as sole oxidant. This transformation has been