Tuning Carbon Dioxide Reduction Reaction Selectivity of Bi Single‐Atom Electrocatalysts with Controlled Coordination Environments

ChemSusChem, Год журнала: 2024, Номер 17(10)

Опубликована: Янв. 15, 2024

Abstract Control over product selectivity of the electrocatalytic CO 2 reduction reaction (CO RR) is a crucial challenge for sustainable production carbon‐based chemical feedstocks. In this regard, single‐atom catalysts (SACs) are promising materials due to their tunable coordination environments, which could enable tailored catalytic activities and selectivities, as well new insights into structure‐activity relationships. However, direct evidence control via systematic tuning SAC environment scarce. work, we have synthesized two differently coordinated Bi SACs anchored same host material (carbon black) characterized RR selectivities. We find that oxophilic, oxygen‐coordinated atoms produce HCOOH, while nitrogen‐coordinated generate CO. Importantly, use support assured alternation dominant factor controlling selectivity. Overall, work demonstrates relationship SACs, can be utilized establish distributions, highlights promise engineering atomic environments tune pathways.

Язык: Английский

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Cascade Annulation Strategy for Expeditious Assembly of Hydroxybenzo[c]chromen-6-ones and Their Photophysical Property Studies

The Journal of Organic Chemistry, Год журнала: 2023, Номер 88(23), С. 16609 - 16620

Опубликована: Ноя. 18, 2023

A 1,8-diazabicyclo[5.4.0]undec-7-ene-promoted cascade double-annulation of ortho-alkynyl quinone methide (in situ generated from modular propargylamine) for constructing 2-aryl-4-hydroxybenzo[c]chromen-6-ones is developed. This synthetic strategy offers remarkable operational simplicity as it allows the use benchtop-grade solvents without need predrying measures and inert atmosphere protection. Additionally, demonstrates good functional group compatibility. The photophysical properties these compounds were also examined, revealing bright fluorescence with high quantum yields.

Язык: Английский

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Synthesis of 2-[(3,4,5-Triphenyl)phenyl]acetic Acid and Derivatives

Molbank, Год журнала: 2024, Номер 2024(2), С. M1837 - M1837

Опубликована: Июнь 20, 2024

New phenylacetic acid derivatives with potentially valuable biological activities and the ability to act as starting materials for various functionalizations have been prepared by a multi-step synthesis. Starting from 2,6-dibromo-4-methylaniline, synthetic route involves construction of basic aromatic structure (3,4,5-triphenyltoluene) (two steps), followed its conversion into 2-[(3,4,5-triphenyl)phenyl]acetic (up five steps). Based on this synthesis, compounds not previously reported in literature were synthesized; literature-known 3,4,5-triphenyltoluene was synthesized first time manner described. This synthesis is applicable preparation numerous new representatives class compounds.

Язык: Английский

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Rhodium(III)-Catalyzed Sequential Cyclization of Enaminones with 1,3-Dienes via C–H Activation for the Synthesis of Fluorenones

The Journal of Organic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Дек. 19, 2024

An efficient method for construction of various fluorenones has been achieved via Rh(III)-catalyzed C–H activation/[4 + 2] annulation/aromatization sequences simple and readily available enaminones 1,3-dienes. This protocol showed good substrate compatibility as an array structurally electronically diverse prepared efficiently in moderate to yields preparative scale utility showing very efficiency the late-stage functionalization complex valuable molecules.

Язык: Английский

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Rh(III)-Catalyzed Synthesis of Isocoumarins via C–H Activation of Phenacyl Phosphoniums with Iodonium Ylides

Synthesis, Год журнала: 2023, Номер 56(01), С. 47 - 54

Опубликована: Ноя. 23, 2023

Abstract A phosphonium-assisted C–H cyclization with iodonium ylides has been developed under redox-neutral rhodium(III) catalysis, offering a wide variety of valuable isocoumarins in moderate to good yields. This transformation proceeds through activation, carbene insertion, and nucleophilic addition processes. The reaction occurs low catalyst loading short time does not require an oxidant.

Язык: Английский

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Synthesis of 2‐Pyrones by Base‐Induced [3+3] Annulation Reaction of Phenacyl Phosphonium Ylides with Cyclopropenones

Asian Journal of Organic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Окт. 18, 2024

Abstract The base‐induced [3+3] annulation reaction of phenacyl phosphonium ylides with cyclopropenones has been proposed. Various polysubstituted 2‐pyrones are achieved in moderate to good yields through C−P bond cleavage and C−O/C−C coupling under simple easy‐to‐operate conditions. synthetic application mechanism have also preliminarily explored gain a deeper understanding this strategy practicality details. This protocol offers an alternative approach for the synthesis useful 2‐pyrone derivatives.

Язык: Английский

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Synthesis of 4‐Cyclobutene‐Isoquinolines From Aryl Imidates by Ru(II)‐Catalyzed Domino C–H Activation/Cyclization

Applied Organometallic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 13, 2024

ABSTRACT A highly regioselective approach for constructing 4‐cyclobutene‐isoquinoline derivatives through ruthenium‐catalyzed domino C–H activation/cyclization of aryl imidates has been demonstrated. This new transformation tolerates various substituted functional groups on and propargylic monofluoroalkynes, resulting in the corresponding products being delivered moderate yields.

Язык: Английский

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