Cobalt(III)-Catalyzed Free Amine Directed Site-Selective Allylation in 2-Aminobiaryls with Vinyl Cyclopropanes DOI Creative Commons
Deepan Chowdhury, Suman Ghosh, K. Satish Reddy

и другие.

Опубликована: Апрель 12, 2023

2-Aminobiaryls are privileged scaffolds and their cogent synthesis diversifications, particularly through the C-H bond activation strategy, is a continuous enterprise in organic synthesis. In this realm, capitalization on susceptible native amine (-NH2) directing group beneficial but increasingly challenging owing to its innate nucleophilic reactivity. Also, reactions of class substrates have traditionally been restricted cross-ring as ortho functionalization presumably requires formation strained high-energy four-membered metallacycle. Herein, we report first example free amine-directed reaction 2-aminobiaryls under high-valent Cp*Co(III)-catalysis, enabling regio- stereoselective allylation high yields. The protocol engages vinyl cyclopropanes allyl synthons where C-C construction event was tunneled process forge internal olefin with exclusive (E)-selectivity. products were judicially used access high-value benzo[d]isoxazoles dihydro phenanthridine derivatives. Mechanistic experiments DFT calculations also conducted unravel rationale behind unique site selectivity, thermodynamic constraints corresponding intermediates favoring over functionalization.

Язык: Английский

Predicting success in Cu-catalyzed C–N coupling reactions using data science DOI Creative Commons
Mohammad H. Samha, Lucas J. Karas, David B. Vogt

и другие.

Science Advances, Год журнала: 2024, Номер 10(3)

Опубликована: Янв. 17, 2024

Data science is assuming a pivotal role in guiding reaction optimization and streamlining experimental workloads the evolving landscape of synthetic chemistry. A discipline-wide goal development workflows that integrate computational chemistry data tools with high-throughput experimentation as it provides experimentalists ability to maximize success expensive campaigns. Here, we report an end-to-end data-driven process effectively predict how structural features coupling partners ligands affect Cu-catalyzed C–N reactions. The established workflow underscores limitations posed by substrates while also providing systematic ligand prediction tool uses probability assess when will be successful. This platform strategically designed confront intrinsic unpredictability frequently encountered deployment.

Язык: Английский

Процитировано

22

Transition metal-catalyzed cross-coupling reactions of N-aryl-2-aminopyridines DOI Creative Commons
Fatemeh Doraghi,

Lina Rezainia,

Mohammad Hossein Morshedsolouk

и другие.

RSC Advances, Год журнала: 2025, Номер 15(2), С. 1134 - 1151

Опубликована: Янв. 1, 2025

Due to the presence of pyridyl directing group, N-aryl-2-aminopyridines can quickly form stable complexes with metals, leading cyclization and functionalization reactions. A large number N-heterocycles nitrogen-based molecules be easily constructed via this direct atom-economical cross-coupling strategy. In review, we have highlighted transformations in various transition metal catalysts, such as palladium, rhodium, iridium, ruthenium, cobalt copper.

Язык: Английский

Процитировано

1

Sn(OTf)2-Catalyzed (3 + 2) Cycloaddition/Sulfur Rearrangement Reaction of Donor–Acceptor Cyclopropanes with Indoline-2-thiones DOI
Yan Jiang, Haojie Ma,

Chen-Ying Zhai

и другие.

Organic Letters, Год журнала: 2024, Номер 26(8), С. 1672 - 1676

Опубликована: Фев. 15, 2024

The (3 + 2) cycloaddition/sulfur rearrangement reaction of donor–acceptor cyclopropanes bearing a single keto acceptor with indoline-2-thiones has been realized. Under the catalysis Sn(OTf)2, series functionalized 3-indolyl-4,5-dihydrothiophenes were synthesized moderate to excellent yields.

Язык: Английский

Процитировано

6

One-Pot Synthesis of Benzo[c]phenanthridine Alkaloids from 7-Azabenzonorbornadienes and Aryl Nitrones DOI

N. Aravindan,

Masilamani Jeganmohan

Organic Letters, Год журнала: 2023, Номер 25(21), С. 3853 - 3858

Опубликована: Май 18, 2023

An efficient synthesis of benzo[c]phenanthridine alkaloids via a synergistic combination C-C bond formation and cycloaromatization reaction is described. Aryl nitrones react with 7-azabenzonorbornadienes in the presence Rh(III) catalyst, providing pharmaceutically useful derivatives good to moderate yields. Using this methodology, highly such as norfagaronine, norchelerythrine, decarine, norsanguinarine, nornitidine were prepared single step.

Язык: Английский

Процитировано

8

AlCl3-mediated ring-opening reactions of indoline-2-thiones with acyl cyclopropanes, bi-cyclopropanes and spirocyclic cyclopropanes DOI
Haojie Ma, Ke Gao, Xuelong Wang

и другие.

Organic & Biomolecular Chemistry, Год журнала: 2023, Номер 21(31), С. 6312 - 6316

Опубликована: Янв. 1, 2023

A series of indolylthio-functionalized ketones were constructed via a ring-opening reaction, and the linear could be further transformed into dihydro-2 H -thiepino[2,3- b ]indoles.

Язык: Английский

Процитировано

6

Cobalt(III)-Catalyzed Free-Amine-Directed Site-Selective Allylation in 2-Aminobiaryls with Vinyl Cyclopropanes DOI
Deepan Chowdhury, Suman Ghosh, K. Satish Reddy

и другие.

ACS Catalysis, Год журнала: 2023, Номер 13(19), С. 12543 - 12552

Опубликована: Сен. 11, 2023

2-Aminobiaryls are privileged scaffolds, and their cogent synthesis diversifications, particularly through the C–H bond activation strategy, a continuous enterprise in organic synthesis. In this realm, capitalizing on susceptible native amine (−NH2) directing group is beneficial but increasingly challenging owing to its innate nucleophilic reactivity. Additionally, reactions of class substrates have traditionally been restricted cross-ring bond, as ortho-C–H functionalization presumably requires formation strained high-energy four-membered metallacycle. Herein, we report free-amine-directed reaction 2-aminobiaryls under high-valent Cp*Co(III)-catalysis, enabling regio- stereoselective allylation high yields. The protocol engages vinyl cyclopropanes allyl synthons, where C–C construction event tunneled process forge an internal olefin with exclusive (E)-selectivity. products were judicially used access high-value benzo[d]isoxazoles dihydrophenanthridine derivatives. Mechanistic experiments DFT calculations also conducted unravel rationale behind unique site selectivity, thermodynamic constraints corresponding intermediates favor over functionalization.

Язык: Английский

Процитировано

6

Rh(III)-Catalyzed C–H Allylation of Aromatic Ketoximes with Vinylaziridines DOI

Jingjing Nie,

Zhong‐Xia Wang

The Journal of Organic Chemistry, Год журнала: 2024, Номер 89(8), С. 5764 - 5777

Опубликована: Апрель 5, 2024

The Rh(III)-catalyzed reaction of aromatic ketoximes with 2-vinylaziridines affords ortho-allylation products the phenyl rings in moderate to excellent yields. requires 0.5 equiv NaOAc as a base and occurs under mild conditions. protocol exhibits ortho-monoallylation selectivity, wide scope substrates, good compatibility functional groups.

Язык: Английский

Процитировано

2

Rhodium-catalyzed annulation for the construction of indole core: An update DOI
Suven Das, Arpita Dutta

Tetrahedron, Год журнала: 2023, Номер 146, С. 133633 - 133633

Опубликована: Сен. 11, 2023

Язык: Английский

Процитировано

4

Ruthenium(II)-Catalyzed S(II)-Directed Aromatic C–H Allylation with Vinylaziridines DOI

Yu‐Tong Duan,

Zhong‐Xia Wang

The Journal of Organic Chemistry, Год журнала: 2023, Номер 88(23), С. 16076 - 16090

Опубликована: Ноя. 16, 2023

The ruthenium-catalyzed reaction of aryl methyl thioethers with vinylaziridines affords ortho-position mono- or bis-allylation products depending on substituents the phenyl rings sulfide substrates ratio reactants. also features mild conditions, good product yields, wide scope substrates, compatibility functional groups, and selective formation E-configurated C-C double bonds.

Язык: Английский

Процитировано

4

Substrate-controlled divergent remote C-H and N-H polyfluoroarylation of 2-aminopyrimidines with polyfluoroarenes via Pd(II)/Pd(0) catalysis DOI

Animesh Das,

Biplab Maji

Chemical Communications, Год журнала: 2024, Номер 60(43), С. 5630 - 5633

Опубликована: Янв. 1, 2024

Substrate-controlled product divergence is demonstrated in Pd-catalyzed reaction of 2-aminopyrimidines. Remote C5–H polyfluoroarylation occurs with N -alkylpyrimidine-2-amines, while N–H dominant for -aryl-pyrimidine-2-amines.

Язык: Английский

Процитировано

1