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