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.
In Situ Generated (Hypo)Iodite Catalysts for the Direct α-Oxyacylation of Carbonyl Compounds with Carboxylic Acids
It′s the iodine: The intra‐ and intermolecular title reaction is catalyzed by an in situgenerated ammonium (hypo)iodite species. Either H2O2 or tert‐butyl hydroperoxide (TBHP) can be used as an environmentally benign oxidant and a wide range of substrates react to give the corresponding α‐acyloxycarbonyl compounds in good to excellent yields.
它是碘:分子内和分子间标题反应是由原位生成的亚碘铵(次同)催化的。H 2 O 2或叔丁基氢过氧化物(TBHP)都可以用作环境友好的氧化剂,并且多种底物反应生成相应的α-酰氧基羰基化合物,收率良好至优异。