Novel palladium-catalyzed synthesis of 1,2-dihydro-4(3H)-carbazolones
摘要:
Two sequential palladium-catalyzed reactions are the key steps in a novel synthetic route to carbazolones, an intermolecular Stille coupling followed by a recently developed palladium-catalyzed reductive N-heteroannulation. A number of functionalized 1,2-dihydro-4(3H)-carbazolones were prepared using this sequence. (C) 2002 Elsevier Science Ltd. All rights reserved.
C<sub>1</sub>-Symmetric Aminosulfoximines as Ligands in Copper-Catalyzed Carbonyl-Ene Reactions
作者:Carsten Bolm、Martin Langner、Pauline Rémy
DOI:10.1055/s-2005-863737
日期:——
Highly modular C 1 -symmetric aminosulfoximines were prepared and applied as chiral ligands in copper-catalyzed enantioselective carbonyl-ene reactions. The optimized system catalyzed the conversion of pyruvates and 1,1-disubstituted olefins yielding the corresponding hydroxy esters with high enantiomeric excesses (up to 91% ee) in moderate yields.
高度模块化的 C 1 -对称氨基亚砜亚胺被制备并用作铜催化的对映选择性羰基-烯反应中的手性配体。优化的系统催化丙酮酸和 1,1-二取代烯烃的转化,以中等产率产生具有高对映体过量(高达 91% ee)的相应羟基酯。
Decarboxylative Halogenation and Cyanation of Electron-Deficient Aryl Carboxylic Acids via Cu Mediator as Well as Electron-Rich Ones through Pd Catalyst under Aerobic Conditions
作者:Zhengjiang Fu、Zhaojie Li、Yuanyuan Song、Ruchun Yang、Yanzhu Liu、Hu Cai
DOI:10.1021/acs.joc.5b02873
日期:2016.4.1
and electron-rich ones by employing Pd(II) as catalyst under aerobic conditions have been established, which lead to smooth synthesis of aryl halides (−I, Br, and Cl) through the decarboxylative functionalization of benzoic acids with readily available halogen sources CuX (X = I, Br, Cl), and easy preparation of benzonitriles from decarboxylative cyanation of aryl carboxylic acids with nontoxic and
A palladium-catalyzed synthesis of isatins (1H-Indole-2,3-diones) from 1-(2-haloethynyl)-2-nitrobenzenes
作者:Björn C.G. Söderberg、Sobha P. Gorugantula、Chet R. Howerton、Jeffrey L. Petersen、Shubhada W. Dantale
DOI:10.1016/j.tet.2009.06.098
日期:2009.9
An inherently regiospecific synthesis of isatins (1H-indole-2,3-diones) starting from 1-halo-2-nitrobenzenes is described. The isatins are formed by an intramolecular palladium-catalyzedannulation of 2-(2-haloethynyl)-1-nitrobenzenes via the formation of 2-haloisatogens.
Synthesis of Indolines and Derivatives by Aza‐Heck Cyclization
作者:Feiyang Xu、Katerina M. Korch、Donald A. Watson
DOI:10.1002/anie.201907758
日期:2019.9.16
For the first time, an aza-Heck cyclization that allows the preparation of indoline scaffolds is described. Using N-hydroxy anilines as electrophiles, which can be easily accessed from the corresponding nitroarenes, this method provides indolines bearing pendant functionality and complex ring topologies. Synthesis of challenging indolines, such as those bearing fully substituted carbon atoms at C2