especially for the synthesis of complex molecules. Herein, we report a mild, general, and functional group tolerant intramolecular hydroamination of unactivated olefins using a Co(salen) complex, an N-fluoropyridinium salt, and a disiloxane reagent. This method, which was carried out at room temperature (or 0 °C), afforded three-, five-, six-, and seven-memberedring nitrogen-containing heterocyclic compounds
On the understanding of BF<sub>3</sub>·Et<sub>2</sub>O-promoted intra- and intermolecular amination and oxygenation of unfunctionalized olefins
作者:Chun-Hua Yang、Wen-Wen Fan、Gong-Qing Liu、Lili Duan、Lin Li、Yue-Ming Li
DOI:10.1039/c5ra10513g
日期:——
for both intra- and intermolecular amination and oxygenation of unfunctionalized olefins. In the presence of 3 equiv. of BF3·Et2O, intramolecular hydroamination of N-(pent-4-enyl)-p-toluenesulfonamides, N-(hex-5-enyl)-p-toluenesulfonamides, intermolecular hydroamination between sulfonamides and cyclohexene, norbornene or styrene, lactonization of pent-4-enoic acid or hex-5-enoic acid compounds and esterification
Brønsted Acid Catalyzed Addition of Phenols, Carboxylic Acids, and Tosylamides to Simple Olefins
作者:Zigang Li、Junliang Zhang、Chad Brouwer、Cai-Guang Yang、Nicholas W. Reich、Chuan He
DOI:10.1021/ol0610035
日期:2006.9
Intermolecular addition of phenols, carboxylicacids, and protected amines to inert olefins can be catalyzed by low concentrations (1-5%) of triflic acid. Functional groups, such as the methoxyl substitution on aromatics, could be tolerated if the concentration of triflic acid and the reaction temperature are controlled appropriately. This reaction provides one of the simplest olefinaddition methods and
Here we disclose a general Co(II/III/IV) electrocatalytic platform for alkene functionalization. Driven by electricity, a set of the oxidative hydrofunctionalization reactions via hydrogen atom transfer were demonstrated without the need for stochiometric chemical oxidants. The scope of the reactions encompasses hydroalkoxylation, hydroacyloxylation, hydroarylation, semipinacol rearrangement, and deallylation