Palladium-Catalyzed Intermolecular C3 Alkenylation of Indoles Using Oxygen as the Oxidant
作者:Wen-Liang Chen、Ya-Ru Gao、Shuai Mao、Yan-Lei Zhang、Yu-Fei Wang、Yong-Qiang Wang
DOI:10.1021/ol302840b
日期:2012.12.7
A general and efficient palladium-catalyzedintermolecular direct C3 alkenylation of indolesusingoxygen as the oxidant has been developed. The reaction is of complete regio- and stereoselectivity. All products are E-isomers at the C3-position, and no Z-isomers or 2-substituted product can be detected.
Knoevenagel Reaction of Diethylphosphonoacetic Acid: A Facile Route to Diethyl (<i>E</i>)-2-Arylvinylphosphonates
作者:Henryk Krawczyk、Łukasz Albrecht
DOI:10.1055/s-2005-918406
日期:——
Knoevenagel reaction of aromatic aldehydes or a-substituted aliphatic aldehydes with diethylphosphonoacetic acid leads to the formation of 3-substituted-2-(diethoxyphosphoryl)acrylic acids. Decarboxylation of the resulting (E)-3-aryl-2-(diethoxyphosphoryllacrylic acids afforded diethyl (E)-2-arylvinylphosphonates. Direct synthesis of diethyl vinylphosphonates from some aromatic aldehydes and formaldehyde
Palladium-Catalyzed Intermolecular Alkenylation of Indoles by Solvent-Controlled Regioselective CH Functionalization
作者:Neil P. Grimster、Carolyn Gauntlett、Christopher R. A. Godfrey、Matthew J. Gaunt
DOI:10.1002/anie.200500468
日期:2005.5.13
Palladium(II)/Polyoxometalate-Catalyzed Direct C-3 Alkenylation of Indoles using Dioxygen as the Terminal Oxidant
作者:Qiufeng Huang、Qianqian Song、Jin Cai、Xiaofeng Zhang、Shen Lin
DOI:10.1002/adsc.201201114
日期:2013.5.17
the direct CH olefination of indoles with alkenes. The transformation is catalyzed by palladium acetate combined with 12‐molybdophosphoric acid and uses oxygen as the terminal oxidant. 4‐Dimethylaminopyridine (DMAP) was observed to be an effective additive for the olefination reaction. Functional groups such as methoxy, benzyloxy, fluoro, bromo, ester, phenyl, and methyl were tolerated under the reaction