Synthesis of Indolizines and Heterocyclic Chalcones Catalyzed by Supported Copper Nanoparticles
作者:María José Albaladejo、Francisco Alonso、Miguel Yus
DOI:10.1002/chem.201204305
日期:2013.4.22
Solvent decides: Versatile coppernanoparticles (Cu NPs) on activated carbon have been found to catalyze the multicomponent synthesis of indolizines in dichloromethane and the synthesis of heterocyclicchalcones in the absence of solvent, in both cases, from pyridine‐2‐carbaldehyde derivatives, secondary amines, and terminal alkynes (see scheme).
An Atomically Precise Pyrazolate‐Protected Copper Nanocluster Exhibiting Exceptional Stability and Catalytic Activity
作者:Yu‐Mei Wang、Xiao‐Chun Lin、Kai‐Ming Mo、Mo Xie、Yong‐Liang Huang、Guo‐Hong Ning、Dan Li
DOI:10.1002/anie.202218369
日期:2023.2.20
An atomicallyprecise pyrazolate-protected coppernanoclusterexhibits extraordinary chemical stability toward oxygen, heat, oxidant (8 wt % H2O2), acid (1 M HCl) and base (20 M KOH). It has been used as stable homogeneous catalysts for synthesis of indolizine with exceptionalcatalyticactivity, delivering superior TOF (3380 h−1) compared to other reported catalysts.
原子精确的吡唑酸盐保护的铜纳米团簇对氧、热、氧化剂 (8 wt % H 2 O 2 )、酸 (1 M HCl) 和碱 (20 M KOH) 表现出非凡的化学稳定性。它已被用作合成中吲嗪的稳定均相催化剂,具有出色的催化活性,与其他已报道的催化剂相比,可提供出色的 TOF (3380 h -1 )。
Synthetic and Mechanistic Studies on the Solvent-Dependent Copper-Catalyzed Formation of Indolizines and Chalcones
作者:María José Albaladejo、Francisco Alonso、María José González-Soria
DOI:10.1021/acscatal.5b00417
日期:2015.6.5
formation from aldehydes and alkynes, a new reaction pathway involving propargyl amines as intermediates that do not undergo rearrangement is presented. The formation of indolizines or chalcones is driven by inductive and solvent effects, with a wide array of both being reported. In both reactions, the nanoparticulate catalyst has been shown to be superior to some commercially available copper catalysts
Synthesis of Aminoindolizidines through the Chemoselective and Diastereoselective Catalytic Hydrogenation of Indolizines
作者:María José Albaladejo、María José González-Soria、Francisco Alonso
DOI:10.1021/acs.joc.6b01782
日期:2016.10.21
synthesis of indolizines followed by heterogeneous catalytic hydrogenation. The latter was found to be chemoselective using platinum(IV) oxide as the catalyst at 3.7 atm, providing the aminoindolizidines in modest-to-high yields (35–95%) and high diastereoselectivity (92:8 to >99:1). It has been experimentally demonstrated that the hydrogenation occurs through the intermediate 5,6,7,8-tetrahydroindolizine