Hypervalent iodine-catalyzed oxylactonization of ketocarboxylic acids to ketolactones
摘要:
The hypervalent iodine-catalyzed oxylactonization of ketocarboxylic acids to ketolactones was achieved in the presence of iodobenzene (10 mol %), p-toluenesulfonic acid monohydrate (20 mol %) and meta-chloroperbenzoic acid as a stoichiometric co-oxidant. (C) 2009 Elsevier Ltd. All rights reserved.
Five- and Six-Membered Nickelacyclic Carboxylates as Reagents for the Facile Synthesis of δ-Ketocarboxylic Acids, Isocoumarins, and 1,3-Dicarbonyl Derivatives of Benzoic Acid
Five- and Six-Membered Nickelacyclic Carboxylates as Reagents for the Facile Synthesis of δ-Ketocarboxylic Acids, Isocoumarins, and 1,3-Dicarbonyl Derivatives of Benzoic Acid
The nickelacyclic carboxylates A and B reacted with α-halo ketones to form α,β-unsaturated δ-ketocarboxylic acids which were easily converted into pyranones or isocoumarins. In addition, reaction of the nickelacyclic acyl derivative C with α-halo ketones resulted in the formation of substituted 1,3-dicarbonyl compounds with a benzoic acid substituent in the 1-position. In these reactions, many functional groups were tolerated.
Hypervalent iodine-catalyzed oxylactonization of ketocarboxylic acids to ketolactones
作者:Muhammet Uyanik、Takeshi Yasui、Kazuaki Ishihara
DOI:10.1016/j.bmcl.2009.03.148
日期:2009.7
The hypervalent iodine-catalyzed oxylactonization of ketocarboxylic acids to ketolactones was achieved in the presence of iodobenzene (10 mol %), p-toluenesulfonic acid monohydrate (20 mol %) and meta-chloroperbenzoic acid as a stoichiometric co-oxidant. (C) 2009 Elsevier Ltd. All rights reserved.