- Preparation of monometallic (Pd, Ag) and bimetallic (Pd/Ag, Pd/Ni, Pd/Cu) nanoparticles via reversed micelles and their use in the Heck reaction
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The metal nanoparticles (NPs) have been prepared using a water-in-oil microemulsion system of water/dioctyl sulfosuccinate sodium salt (aerosol-OT, AOT)/isooctane at 25 °C. Since the NPs produced in this system can endure forcing conditions (100 °C), this system has been used for the synthesis of nano-catalysts in the Heck reactions. FE-SEM, DLS, and UV/vis analyses have been used to characterize the surface morphology, size, and proof of the formation of all the prepared metal NPs, respectively. In addition, the effects of some reaction parameters (here, bases and solvents) were optimized. Differences in the catalytic properties of the synthesized NPs have also been investigated. Consequently, the Pd/Cu (4:1) bimetallic NP showed the highest activity in the C-C coupling reaction of the iodobenzene with the styrene, thus it is employed as the superior catalyst in this study. Therefore, the Pd/Cu (4:1) bimetallic NPs were further investigated using TEM and XRD analyses. This catalyst system is also reusable for six runs with very negligible reduction in the efficiency.
- Heshmatpour, Felora,Abazari, Reza,Balalaie, Saeed
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Read Online
- CYCLOADDITION REACTIONS USING QUANTUM DOTS
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Disclosed herein are methods in which colloidal quantum dots (QDs) can serve as visible-light chromophores, photocatalysts, and reusable scaffolds for homo- and hetero-intermolecular [2+2] photocycloadditions. The methods may lead to >90% tunable regiosel
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Paragraph 0131; 0133-0134
(2020/11/30)
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- INDAZOLE DERIVATIVES USEFUL AS GLUCAGON RECEPTOR ANTAGONISTS
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The present invention is directed to indazole derivatives, pharmaceutical compositions containing them and their use in the treatment and/or prevention of disorders and conditions ameliorated by antagonizing one or more glucagon receptors, including for e
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Paragraph 0627; 0628
(2018/03/25)
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- INDAZOLE DERIVATIVES USEFUL AS GLUCAGON RECEPTOR ANTAGONISTS
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The present invention is directed to indazole derivatives, pharmaceutical compositions containing them and their use in the treatment and/or prevention of disorders and conditions ameliorated by antagonizing one or more glucagon receptors, including for e
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Paragraph 0584
(2018/03/25)
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- A promiscuous de Novo retro-aldolase catalyzes asymmetric michael additions via Schiff base intermediates
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Recent advances in computational design have enabled the development of primitive enzymes for a range of mechanistically distinct reactions. Here we show that the rudimentary active sites of these catalysts can give rise to useful chemical promiscuity. Sp
- Garrabou, Xavier,Beck, Tobias,Hilvert, Donald
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supporting information
p. 5609 - 5612
(2015/10/12)
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- Morpholinium trifluoroacetate-catalyzed aldol condensation of acetone with both aromatic and aliphatic aldehydes
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We report a highly efficient, general and practical method for the aldol condensation of acetone with aromatic and aliphatic aldehydes, using morpholinium trifluoroacetate as a catalyst.
- Zumbansen, Kristina,Doehring, Arno,List, Benjamin
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experimental part
p. 1135 - 1136
(2010/09/05)
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- HETEROCYCLIC COMPOUNDS USEFUL AS ANABOLIC AGENTS FOR LIVESTOCK ANIMALS
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Compounds of formula (I) and pharmaceutically acceptable salts thereof are agonists at the beta-2 adrenoceptor. They are useful as feed additives for livestock animals.
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Page/Page column 84
(2008/06/13)
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- Scope and applicability of an expedient synthesis leading to polysubstituted 3-(carboxyphenyl)pyrroles
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A convenient three-step route toward a functionalized pyrrole building block for novel anti-inflammatory agents is reported. In contrast to previous strategies, the present approach focuses on inexpensive starting materials and application on a multigram
- Ullrich, Thomas,Ghobrial, Michael,Weigand, Klaus,Marzinzik, Andreas L.
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p. 1109 - 1119
(2008/02/01)
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