Expeditious Synthesis of Multisubstituted Quinolinone Derivatives Based on Ring Recombination Strategy
摘要:
We achieved a concise construction of 3-substituted quinolinone derivatives based on a ring recombination strategy. In this process, seven transformations involving two types of cyclization proceeded in one pot to afford various quinolinone derivatives in good to excellent chemical yields (up to 98%).
One-pot photo-reductive N-alkylation of aniline and nitroarene derivatives with primary alcohols over Au–TiO<sub>2</sub>
作者:David Stíbal、Jacinto Sá、Jeroen A. van Bokhoven
DOI:10.1039/c2cy20511d
日期:——
We report the photo-catalytic N-alkylation of aniline by Au–TiO2. We successfully alkylate aniline with several primaryalcohols. The combined selectivities of mono- and di-alkylated products were always in excess of 70% and dependent on the alkylating alcohol used. A one-pot reaction from nitrobenzene was found to be possible with several substrates. Preliminary experiments showed that this approach
Palladium/Copper-Catalyzed Oxidative CH Alkenylation/N-Dealkylative Carbonylation of Tertiary Anilines
作者:Renyi Shi、Lijun Lu、Hua Zhang、Borui Chen、Yuchen Sha、Chao Liu、Aiwen Lei
DOI:10.1002/anie.201303911
日期:2013.9.27
CH/CN activation: The first palladium/copper‐catalyzed aerobic oxidative CH alkenylation/N‐dealkylative carbonylation of tertiary anilines has been developed. Various functional groups were tolerated and acrylic ester could also be suitable substrates. This transformation provided efficient and straightforward synthesis of biologically active 3‐methyleneindolin‐2‐one derivatives from cheap and simple
Ç H / C Ñ活化:第一钯/铜催化氧化好氧Ç ħ烯基/ Ñ叔苯胺-dealkylative羰基化得到了发展。可以容忍各种官能团,丙烯酸酯也可以用作合适的底物。这种转化提供了从廉价,简单的底物中高效,直接地合成具有生物活性的3-亚甲基吲哚-2-酮衍生物的功能。
N-methylaniline and asymmetric cyclopropylphosphonation reactions of N,N-diethylaniline derivatives with diazomethylphosphonates are reported. Optically active cyclopropylphosphonate derivatives were directly synthesized from diazomethylphosphonates and N,N-diethylaniline derivatives catalyzed by a Ru(II)-Pheox complex in one step in good yields and high diastereoselectivities (up to trans/cis = > 99:1<)
Oxybromination catalysed by the heteropolyanion compound H5PMo10V2O40 in an organic medium: selective para-bromination of phenol
作者:Ronny Neumann、Igal Assael
DOI:10.1039/c39880001285
日期:——
bromination of ketones and alkenes have been achieved by oxybromination at ambient conditions catalysed by the mixed addenda heteropolyanion compound H5PMo10V2O40, which is dissolved in nonpolar chlorohydrocarbonsolvent by complexation with tetraglyme.
苯酚及其衍生物的选择性溴化反应以及酮和烯烃的溴化反应是通过在环境条件下由混合加成杂杂阴离子化合物H 5 PMo 10 V 2 O 40催化氧化溴化而实现的,该杂化阴离子化合物H 5 PMo 10 V 2 O 40通过与四甘醇二甲醚络合而溶解在非极性氯代烃溶剂中。