A cobalt covalent organic framework: a dual-functional atomic-level catalyst for visible-light-driven C–H annulation of amides with alkynes

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(21), С. 11514 - 11523

Опубликована: Янв. 1, 2022

A heterogeneous cobalt covalent organic framework (CoCOF-SYNU-1) serves as a dual functional atomic-level catalyst to balance reaction efficiency and selectivity in visible-light-driven C–H annulation of amides with alkynes.

Язык: Английский

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Redox-neutral C–H annulation strategies for the synthesis of heterocycles via high-valent Cp*Co(iii) catalysis

Organic & Biomolecular Chemistry, Год журнала: 2023, Номер 21(19), С. 3918 - 3941

Опубликована: Янв. 1, 2023

This review demonstrates the redox-neutral synthetic approaches towards valuable heterocycles such as isoquinolines, indoles, isoquinolones, and tetrahydroquinolines via high-valent Cp*Co( iii ) catalysis.

Язык: Английский

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Indole Synthesis by Cobalt-Catalyzed Intramolecular Amidation via the Oxidatively Induced Reductive Elimination Pathway

ACS Catalysis, Год журнала: 2024, Номер 14(3), С. 1690 - 1698

Опубликована: Янв. 17, 2024

C–H bond activation and functionalization using high-valent cobalt catalysis typically involves a Co(III)/Co(I) catalytic cycle. Because of the lack evidence challenges associated with high reactivity instability Co(IV) intermediates, reports on mechanism investigation involving intermediacy are still underexplored. Herein, we report an efficient synthesis indole-2-carboxylic esters via intramolecular amidation α-amidoacrylates experimental computational studies reaction mechanism, which oxidatively induced reductive elimination from species.

Язык: Английский

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Traceless Directing Groups in Sustainable Metal-Catalyzed C–H Activation

Catalysts, Год журнала: 2021, Номер 11(5), С. 554 - 554

Опубликована: Апрель 27, 2021

Sustainable transformations towards the production of valuable chemicals constantly attract interest, both in terms academic and applied research. C–H activation has long been scrutinized this regard, given that it offers a straightforward pathway to prepare compounds great significance. In context, directing groups (DG) have paved way for chemical had not achievable using traditional reactions. Few steps, high yields, selectivity inert substrates are some invaluable assets directed catalysis. Additionally, employment traceless (TDG) greatly improves simplifies strategy, enabling realization multi-step reactions one-pot, cascade procedures. Cheap, abundant, readily available transition metal salts complexes can catalyze plethora employing TDGs, usually under low catalyst loadings—rarely stoichiometric amounts, leading greater atom economy milder conditions with increased yields step-economy. This review article summarizes all work done on TDG-assisted catalysis manganese, iron, cobalt, nickel, or copper catalysts, discusses structure-activity relationships observed, by presenting catalytic pathways range reported thus far.

Язык: Английский

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Catalytic Tetrazole Synthesis via [3+2] Cycloaddition of NaN₃ to Organonitriles Promoted by Co(II)-complex: Isolation and Characterization of a Co(II)-diazido Intermediate

ACS Omega, Год журнала: 2024, Номер 9(19), С. 21626 - 21636

Опубликована: Апрель 29, 2024

The [3+2] cycloaddition of sodium azide to nitriles give 5-substituted 1H-tetrazoles is efficiently catalyzed by a Cobalt(II) complex (

Язык: Английский

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