C-3 alkylation of oxindole with alcohols by Pt/CeO<sub>2</sub> catalyst in additive-free conditions
作者:Chandan Chaudhari、S. M. A. Hakim Siddiki、Kenichi Kon、Atsuko Tomita、Yutaka Tai、Ken-ichi Shimizu
DOI:10.1039/c3cy00911d
日期:——
In a series of transition metal-loaded CeO2 catalysts and Pt-loaded catalysts on various supports, Pt-loaded CeO2 shows the highest activity for the selectiveC-3alkylation of oxindole with octanol. The catalyst is effective for alkylation of oxindole and N-substituted oxindole with a series of substituted benzyl, linear, hetero-aryl alcohols under additive-free conditions and is recyclable. Our results
Esterification of Tertiary Amides by Alcohols Through C−N Bond Cleavage over CeO
<sub>2</sub>
作者:Takashi Toyao、Md. Nurnobi Rashed、Yoshitsugu Morita、Takashi Kamachi、S. M. A. Hakim Siddiki、Md. A. Ali、A. S. Touchy、Kenichi Kon、Zen Maeno、Kazunari Yoshizawa、Ken‐ichi Shimizu
DOI:10.1002/cctc.201801098
日期:2019.1.9
process proceeds through rate limiting addition of a CeO2 lattice oxygen to the carbonyl group of the adsorbed acetamide species with energy barrier of 17.0 kcal/mol. This value matches well with experimental value (17.9 kcal/mol) obtained from analysis of the Arrhenius plot. Further studies by in situ FT‐IR and temperatureprogrammeddesorption using probe molecules demonstrate that both acidic and
Selective N-alkylation of indoles with primary alcohols using a Pt/HBEA catalyst
作者:S. M. A. Hakim Siddiki、Kenichi Kon、Ken-ichi Shimizu
DOI:10.1039/c4gc01419g
日期:——
(H+-exchanged BEA zeolite) is found to be an effective and reusable heterogeneous catalyst for regioselective N-alkylation of indoles with primary aliphatic and benzylic alcohols under additive-free conditions driven by the borrowing-hydrogen methodology. Structural and mechanistic studies suggest a cooperative mechanism of the Pt0 site on Pt metal clusters and the Brønsted acid site of the zeolite,
The impact of an isoreticular expansion strategy on the performance of iodine catalysts supported in multivariate zirconium and aluminum metal–organic frameworks
作者:Babak Tahmouresilerd、Michael Moody、Louis Agogo、Anthony F. Cozzolino
DOI:10.1039/c9dt00368a
日期:——
A new iodine catalyst was supported in two different MOFs and the catalytic activity for the oxidation of hydroquinones and catechols was evaluated.
High catalytic activity of a bimetallic AgPd alloy supported on UiO-66 derived porous carbon for transfer hydrogenation of nitroarenes using formic acid-formate as the hydrogen source
作者:Saisai Cheng、Ningzhao Shang、Xin Zhou、Cheng Feng、Shutao Gao、Chun Wang、Zhi Wang
DOI:10.1039/c7nj00442g
日期:——
nanoparticles anchored on metal–organic framework (UiO-66) derived N-doped porouscarbon (NPC-UiO-66) was fabricated and used as a catalyst for the catalytic transferhydrogenation of nitroarenes using formic acid-formate as the hydrogen source. The results demonstrated that the Ag1Pd9@NPC-UiO-66 composite exhibited extraordinary catalytic activity toward the hydrogenation of nitroarenes to anilines