Recent Advances in Liquid-phase Heterogeneous Photocatalysis for Organic Synthesis by Selective Oxidation

: Furan and its derivatives find wide-spread application as pharmaceuticals, pigments, dyes, brighteners, flavour & fragrance compounds and insecticides. They also exhibit anti-hyperglycemic, analgesic, anti-inflammatory, antibacterial, anti-fungal and anti-tumour activities. Silver catalysts are nowadays commonly used in organic synthesis due to the high oxidation potential and versatile nature of silver complexes. In this review, we summarise the recent advances in the synthesis and applications of furan moiety using silver catalysis and covers literature from 2015-2020.

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Recent Advances in Plasmonic Photocatalysis Based on TiO 2 and Noble Metal Nanoparticles for Energy Conversion, Environmental Remediation, and Organic Synthesis

Small ◽

10.1002/smll.202101638 ◽

2021 ◽

pp. 2101638

Author(s):

Ajay Kumar ◽

Priyanka Choudhary ◽

Ashish Kumar ◽

Pedro H. C. Camargo ◽

Venkata Krishnan

Keyword(s):

Energy Conversion ◽

Metal Nanoparticles ◽

Organic Synthesis ◽

Noble Metal ◽

Environmental Remediation ◽

Noble Metal Nanoparticles ◽

Recent Advances

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Ligand-Driven Advances in Iridium Catalyzed sp3 C-H Borylation: 2,2’-Dipyridylarylmethane

Synlett ◽

10.1055/a-1344-1904 ◽

2020 ◽

Author(s):

Margaret R Jones ◽

Nathan D. Schley

Keyword(s):

Recent Work ◽

Organic Synthesis ◽

Functional Group ◽

Reaction Conditions ◽

Recent Advances ◽

Additional Ligand ◽

Limited Application ◽

Hydrocarbon Substrates ◽

Phenanthroline Ligands

The field of catalytic C-H borylation has grown considerably since its founding, providing a means for the preparation of synthetically versatile organoborane products. While sp2 C-H borylation methods have found widespread and practical use in organic synthesis, the analogous sp3 C-H borylation reaction remains challenging and has seen limited application. Existing catalysts are often hindered by incomplete consumption of the diboron reagent, poor functional group tolerance, harsh reaction conditions, and the need for excess or neat substrate. These challenges acutely affect C-H borylation chemistry of unactivated hydrocarbon substrates, which has lagged in comparison to methods for the C-H borylation of activated compounds. Herein we discuss recent advances in sp3 C-H borylation of undirected substrates in the context of two particular challenges: (1) utilization of the diboron reagent and (2) the need for excess or neat substrate. Our recent work on the application of dipyridylarylmethane ligands in sp3 C-H borylation has allowed us to make contributions in this space and has presented an additional ligand scaffold to supplement traditional phenanthroline ligands.

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Recent Advances in C–Br Bond Formation

Synlett ◽

10.1055/s-0037-1610772 ◽

2021 ◽

Author(s):

Ying-Yeung Yeung ◽

Jonathan Wong

Keyword(s):

Organic Synthesis ◽

Aromatic Compounds ◽

Bond Formation ◽

Cross Coupling ◽

Catalytic Site ◽

Atom Transfer ◽

Bond Forming ◽

Recent Advances ◽

Catalytic Asymmetric ◽

Site Selective

AbstractOrganobromine compounds are extremely useful in organic synthesis. In this perspective, a focused discussion on some recent advancements in C–Br bond-forming reactions is presented.1 Introduction2 Selected Recent Advances2.1 Catalytic Asymmetric Bromopolycyclization of Olefinic Substrates2.2 Catalytic Asymmetric Intermolecular Bromination2.3 Some New Catalysts and Reagents for Bromination2.4 Catalytic Site-Selective Bromination of Aromatic Compounds2.5 sp3 C–H Bromination via Atom Transfer/Cross-Coupling3 Outlook

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Metal-Organic Frameworks in Oxidation Catalysis with Hydrogen Peroxide

Catalysts ◽

10.3390/catal11020283 ◽

2021 ◽

Vol 11 (2) ◽

pp. 283

Author(s):

Oxana Kholdeeva ◽

Nataliya Maksimchuk

Keyword(s):

Hydrogen Peroxide ◽

Liquid Phase ◽

Selective Oxidation ◽

Metal Organic Frameworks ◽

Short Review ◽

Catalytic Performance ◽

Oxidation Catalysis ◽

Catalyst Stability ◽

Aqueous Hydrogen Peroxide ◽

Metal Organic

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous liquid-phase selective oxidation catalysis with the green oxidant–aqueous hydrogen peroxide. MOFs having outstanding thermal and chemical stability, such as Cr(III)-based MIL-101, Ti(IV)-based MIL-125, Zr(IV)-based UiO-66(67), Zn(II)-based ZIF-8, and some others, will be in the main focus of this work. The effects of the metal nature and MOF structure on catalytic activity and oxidation selectivity are analyzed and the mechanisms of hydrogen peroxide activation are discussed. In some cases, we also make an attempt to analyze relationships between liquid-phase adsorption properties of MOFs and peculiarities of their catalytic performance. Attempts of using MOFs as supports for construction of single-site catalysts through their modification with heterometals will be also addressed in relation to the use of such catalysts for activation of H2O2. Special attention is given to the critical issues of catalyst stability and reusability. The scope and limitations of MOF catalysts in H2O2-based selective oxidation are discussed.

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Recent advances in the synthesis and reactivity of azetidines: strain-driven character of the four-membered heterocycle

Organic & Biomolecular Chemistry ◽

10.1039/d1ob00061f ◽

2021 ◽

Vol 19 (15) ◽

pp. 3274-3286

Author(s):

Haseeb Mughal ◽

Michal Szostak

Keyword(s):

Organic Synthesis ◽

Future Directions ◽

Recent Advances ◽

Membered Heterocycle

Azetidines represent one of the most important four-membered heterocycles in organic synthesis. We provide an overview of the synthesis, reactivity and application of azetidines with a focus on the most recent advances, trends and future directions.

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