Alcohols as Substrates in Transition-Metal-Catalyzed Arylation, Alkylation, and Related Reactions

Chemical Reviews, Год журнала: 2024, Номер 124(9), С. 6078 - 6144

Опубликована: Апрель 17, 2024

Alcohols are abundant and attractive feedstock molecules for organic synthesis. Many methods their functionalization require them to first be converted into a more activated derivative, while recent years have seen vast increase in the number of complexity-building transformations that directly harness unprotected alcohols. This Review discusses how transition metal catalysis can used toward this goal. These broadly classified three categories. Deoxygenative functionalizations, representing derivatization C–O bond, enable alcohol act as leaving group formation new C–C bonds. Etherifications, characterized by O–H represent classical reactivity has been modernized include mild reaction conditions, diverse partners, high selectivities. Lastly, chain reactions described, wherein acts mediator formal C–H alkyl backbone. Each these classes transformation will discussed context intermolecular arylation, alkylation, related reactions, illustrating alcohols harnessed

Язык: Английский

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Recent advances on cross-coupling of alcohols via borrowing hydrogen catalysis

Chemical Communications, Год журнала: 2024, Номер 60(30), С. 4002 - 4014

Опубликована: Янв. 1, 2024

This article highlights the recent advances and significance of β-alkylation reactions towards synthesis higher order alcohols.

Язык: Английский

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A review of novel materials for nano-photocatalytic and optoelectronic applications: recent perspectives, water splitting and environmental remediation

Deleted Journal, Год журнала: 2024, Номер 1(4), С. 100018 - 100018

Опубликована: Сен. 11, 2024

Язык: Английский

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In Situ Reduced Ni–Sn Bimetallic Catalyst for Enhancing Direct Upgrading of Aqueous Ethanol to Higher Alcohols

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Язык: Английский

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Efficient N-Methylation of Primary Amides Using Methanol Under Mn(I)-Catalysis

Tetrahedron, Год журнала: 2025, Номер unknown, С. 134535 - 134535

Опубликована: Фев. 1, 2025

Язык: Английский

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The Chemistry of the Sugar-Based Platform Chemicals

Elsevier eBooks, Год журнала: 2025, Номер unknown, С. 274 - 303

Опубликована: Янв. 1, 2025

Язык: Английский

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H₂ Pressure Dependence in the Homogeneously Catalyzed Guerbet Reaction of Ethanol to Butanol using Mn(I) and Ru(II)

ChemCatChem, Год журнала: 2024, Номер 16(10)

Опубликована: Фев. 1, 2024

Abstract The homogeneously catalyzed Guerbet upgrading of ethanol to butanol can be modulated by the application partial H 2 pressure before reaction. Ruthenium(II) PNP pincer complexes with methylene‐extended acridine‐based ligands and singly‐chelated ruthenium(II) PN perform best at very low catalyst loadings upon catalyst‐specific pre‐reaction pressure. combination manganese(I) MACHO‐type allows for even lower ruthenium while retaining base load consumption, thus enabling high space‐time yields, productivity recyclability. Mechanistically, Mn is proposed stabilize coordinatively unsaturated Ru species allow coordination ethoxide instead attacking electrophilic ligand backbone based on NMR spectroscopy X‐ray crystallography.

Язык: Английский

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Backbone-functionalised ruthenium diphosphine complexes for catalytic upgrading of ethanol and methanol to iso-butanol

Dalton Transactions, Год журнала: 2024, Номер 53(18), С. 8005 - 8010

Опубликована: Янв. 1, 2024

Efficient catalysts for Guerbet-type ethanol/methanol upgrading to iso-butanol have been developed

Язык: Английский

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Advances in the Homogeneously Catalyzed Hydrogen Production from Biomass Derived Feedstocks: A Review

ChemCatChem, Год журнала: 2024, Номер unknown

Опубликована: Апрель 10, 2024

Abstract Biomass–derived feedstocks for hydrogen production are crucial as an alternative to fossil fuel especially in those areas where green electricity and clean water scarce. In this framework the transformation of simple (formic acid, alcohols) more complex (polyalcohols, sugars cellulose) bio–derivatives pure is recognized a promising approach. Parallel great effort heterogeneous catalysis, milder molecular systems represent selective eye solutions mechanistic insights. present review introduction summarizes challenges catalytic utilization biomass–derived feedstocks, followed by advances homogeneously catalyzed from different substrates which will cover formic with oustanding efficiency noble metals results earth abundant ones alcohols polyalcohols, particular emphasis development heterogenized systems, ligand assisted catalysts bi‐catalytic synergistic allow avoid base promote catalyst stability recyclability. last part, description substrates, such cellulose, show role complexes main side reactions. Critical comments on reported provided along whole discussion.

Язык: Английский

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Pincer-Ligated Iridium Complexes with Low-Field Ancillary Ligands: Complexes of (^iPrPCP)IrCl₂ and Comparison with (^iPrPCP)IrHCl

Organometallics, Год журнала: 2024, Номер 43(11), С. 1317 - 1327

Опубликована: Май 22, 2024

Pincer-ligated iridium complexes have been widely developed, and (pincer)Ir(III) complexes, particularly five-coordinate, are central to their chemistry. Such typically bear two formally anionic ligands in addition the pincer ligand itself. Yet despite prevalence of halides as transition metal chemistry, there relatively few examples which both these ancillary or even other monodentate low-field anions. We report a study fragment (iPrPCP)IrCl2 (iPrPCP = κ3-2,6-C6H3(CH2PiPr2)) adducts thereof. These species found be thermodynamically disfavored relative corresponding hydridohalides. For example, DFT calculations experiments indicate that one Ir–Cl bond will undergo reaction with H2 give (iPrPCP)IrHCl an adduct In presence aqueous HCl, adds chloride ion unusual example complex ((iPrPCP)IrCl3–) Zundel cation (H5O2+). is not stable monomer at room temperature but exists solution mixture clusters can add various small molecules. dimerization trimerization more favorable than analogous reactions (iPrPCP)IrHCl, accord cluster formation being observed only for dichloride complex.

Язык: Английский

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