Efficient Synthesis of Functionalized Dihydro-1<i>H</i>-indol-4(5<i>H</i>)-ones via One-Pot Three-Component Reaction under Catalyst-Free Conditions
作者:Hui-Yan Wang、Da-Qing Shi
DOI:10.1021/co4000198
日期:2013.5.13
A facile and efficient one-pot procedure for the preparation of functionalized dihydro-1H-indol-4(5H)-ones by a catalyst-free, three-component reaction of 1,3-dicarbonyl compounds, arylglyoxal monohydrate and enaminones under mild conditions in excellent yield is reported. This synthesis was confirmed to follow the group-assisted-purification (GAP) chemistry process, which can avoid traditional purifications
Domino reactions of cyclic enaminones leading to selective synthesis of pentacyclic indoles and its functionalization
作者:Wei Fan、Yan-Rong Li、Qun Li、Bo Jiang、Guigen Li
DOI:10.1016/j.tet.2016.06.058
日期:2016.8
established, providing selective protocol to pentacyclic indoles with different substituted patterns (up to 50 examples). Both substitutions on the cyclic enaminone ring and reaction temperatures showed obvious impact on the reaction pathways. For instance, selective allylic hydroxylation and allylic esterification of in situ generated indoles depend on reaction temperatures. With special substituents
A novel and reusable magnetic nanocatalyst developed based on graphene oxide incorporated strontium nanoparticles for the facial synthesis of β-enamino ketones under solvent-free conditions
A novelmagnetic SrFeGO nanocatalyst (NC) was synthesized through a simple sol–gel technique by introducing strontium and iron oxide nanoparticles onto graphene. The synthesized NC was characterized using FT‐IR and FE‐SEM. Subsequently, the catalytic activity of SrFeGO was tested in a reaction between β‐dicarbonyl compounds and aniline derivatives to gain β‐enamino ketone derivatives under solvent‐free
Palladium-Catalyzed Coupling of Vinylogous Amides with Aryl Halides: Applications to the Synthesis of Heterocycles
作者:Scott D. Edmondson、Anthony Mastracchio、Emma R. Parmee
DOI:10.1021/ol000031z
日期:2000.4.1
of vinylogous amides with aryl bromides and chlorides. The scope of this reaction with respect to the aryl component is investigated. Additionally, a tandemreaction sequence in which the above coupling is followed by an intramolecular Heck reaction is presented. These reactions can be applied to high-yielding, one-potsyntheses of nitrogen-containing heterocycles.
Nano Fibrous Silica Sulphuric Acid as an Efficient Catalyst for the Synthesis of β-Enaminone
作者:Zeba N. Siddiqui、Kulsum Khan、Nayeem Ahmed
DOI:10.1007/s10562-013-1190-4
日期:2014.4
Synthesis of KCC-1 silica sulphuric acid as a new catalyst has been reported. The catalyst was characterized using XRD, SEM, TEM, BET, FT-IR, TGA-DTA, and EDX analysis. The catalytic activity was evaluated for the synthesis of enaminonesundersolvent-freeconditions. The catalyst was easily recovered and reused up to seven cycles with slight loss of activity. The attractive features of this protocol