Six-membered ring systems: pyridines and benzo derivatives DOI

Jeanese C. Badenock

Progress in heterocyclic chemistry, Год журнала: 2021, Номер unknown, С. 341 - 379

Опубликована: Янв. 1, 2021

Язык: Английский

HFIP in Organic Synthesis DOI
Hashim F. Motiwala,

Ahlam M. Armaly,

Jackson G. Cacioppo

и другие.

Chemical Reviews, Год журнала: 2022, Номер 122(15), С. 12544 - 12747

Опубликована: Июль 17, 2022

1,1,1,3,3,3-Hexafluoroisopropanol (HFIP) is a polar, strongly hydrogen bond-donating solvent that has found numerous uses in organic synthesis due to its ability stabilize ionic species, transfer protons, and engage range of other intermolecular interactions. The use this exponentially increased the past decade become choice some areas, such as C–H functionalization chemistry. In review, following brief history HFIP an overview physical properties, literature examples reactions using or additive are presented, emphasizing effect each reaction.

Язык: Английский

Процитировано

325

Rh(III)-Catalyzed [5 + 1] Annulation of Indole-enaminones with Diazo Compounds To Form Highly Functionalized Carbazoles DOI
Zhidong Jiang, Jianhui Zhou, Haoran Zhu

и другие.

Organic Letters, Год журнала: 2021, Номер 23(11), С. 4406 - 4410

Опубликована: Май 21, 2021

A novel Rh(III)-catalyzed C–H activation/annulation cascade of indole-enaminones with diazo compounds was reported to construct diversely functionalized carbazole frameworks. The most notable characteristic is that this transformation could smoothly furnish a [5 + 1] cyclization product good excellent yields (up 95%), accompanied by the thorough removal acetyl and N,N-dimethyl groups two substrates from target products, rather than normally expected [4 2] products.

Язык: Английский

Процитировано

52

Synthesis of Pyrazolo[1,2‐a]cinnolines via Rhodium(III)‐Catalyzed [4+2] Annulation Reactions of Pyrazolidinones with Sulfoxonium Ylides DOI

Shulei Hu,

Xu Han,

Xiong Xie

и другие.

Advanced Synthesis & Catalysis, Год журнала: 2021, Номер 363(13), С. 3311 - 3317

Опубликована: Май 8, 2021

Abstract A method to synthesize pyrazolo[1,2‐a]cinnolines via rhodium(III)‐catalyzed C−H activation of pyrazolidinones and subsequent [4+2] annulation sulfoxonium ylides was developed. 5‐Substituted or 5,10‐disubstituted could be obtained by slightly adjusting the reaction conditions. Gram‐scale synthesis practical transformations proved practicability this method. The mechanism proposed in article on basis preliminary mechanistic results previous reports. This features simplified operation, metal‐oxidant free, readily available reactants. magnified image

Язык: Английский

Процитировано

25

Rh(III)-Catalyzed Spiroannulation Reaction of N-Aryl Nitrones with 2-Diazo-1,3-indandiones: Synthesis of Spirocyclic Indole-N-oxides and Their 1,3-Dipolar Cycloaddition with Maleimides DOI
Shenghai Guo, Ziyi Zhang, Zhaotong Wei

и другие.

The Journal of Organic Chemistry, Год журнала: 2023, Номер 88(6), С. 3845 - 3858

Опубликована: Март 8, 2023

An efficient strategy for the preparation of spirocyclic indole-N-oxide compounds through a Rh(III)-catalyzed [4 + 1] spiroannulation reaction N-aryl nitrones with 2-diazo-1,3-indandiones as C1 synthons under extremely mild conditions is presented. From this reaction, 40 indole-N-oxides were easily obtained in up to 98% yield. In addition, title could be successfully used construction structurally intriguing maleimide-containing fused polycyclic scaffolds via diastereoselective 1,3-dipolar cycloaddition maleimides.

Язык: Английский

Процитировано

11

A removable directing group-assisted Rh(iii)-catalyzed direct C–H bond activation/annulation cascade to synthesize highly fused isoquinolines DOI

Yilang Cheng,

Xu Han, Junyou Li

и другие.

Organic Chemistry Frontiers, Год журнала: 2020, Номер 7(20), С. 3186 - 3192

Опубликована: Янв. 1, 2020

A removable directing group-assisted Rh(iii)-catalyzed direct C–H bond activation/annulation cascade was developed to synthesize highly fused isoquinolines with good excellent yields and a functional group tolerance.

Язык: Английский

Процитировано

25

Sulfoximines Assisted Rh(III)-Catalyzed C–H Activation/Annulation Cascade to Synthesize Highly Fused Indeno-1,2-benzothiazines DOI
Jian Li, Hui Li,

Daqing Fang

и другие.

The Journal of Organic Chemistry, Год журнала: 2021, Номер 86(21), С. 15217 - 15227

Опубликована: Окт. 6, 2021

A facile access to highly fused tetracyclic indeno-1,2-benzothiazines has been established via a Rh(III)-catalyzed C-H bond activation and intramolecular annulation cascade between sulfoximides all-carbon diazo indandiones. This strategy is characterized by the fact that coupling partners do not require preactivation, along with its high efficiency, broad substrate generality, transformation. Particularly, conjugated products demonstrate good optical properties can easily enter cells emit bright fluorescence for live cell imaging.

Язык: Английский

Процитировано

21

Novel Sulfinamide-Based Chiral Ligand Promoted Chiral Diarylmethanol Preparation via exo-Directed Asymmetric C–H Alkynylation under Mild Conditions DOI
Xin Yu, Siqi Liu, Lei Wang

и другие.

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 2540 - 2549

Опубликована: Янв. 28, 2025

Язык: Английский

Процитировано

0

Pyran-Fused Analogues and Their Potential Applications DOI
Sumit Kumar,

Aditi Arora,

Sandeep Kumar

и другие.

Russian Journal of Bioorganic Chemistry, Год журнала: 2025, Номер 51(2), С. 373 - 438

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0

Synthesis of 8-Alkoxy-5H-isochromeno[3,4-c]isoquinolines and 1-Alkoxy-4-arylisoquinolin-3-ols through Rh(III)-Catalyzed C–H Functionalization of Benzimidates with 4-Diazoisochroman-3-imines and 4-Diazoisoquinolin-3-ones DOI
Zhenmin Li, Jianwei Xie, Ping Lü

и другие.

The Journal of Organic Chemistry, Год журнала: 2020, Номер 85(8), С. 5525 - 5535

Опубликована: Март 23, 2020

Rh(III)-catalyzed C-H activation/annulation of benzimidates with 4-diazoisochroman-3-imines furnished 8-alkoxy-5H-isochromeno[3,4-c]isoquinolines in moderate to excellent yields a broad range substrate scope. The reaction was carried out under mild conditions and could be scaled up practical usage. Similar between 4-diazoisoquinolin-3-ones provided 1-alkoxy-4-arylisoquinolin-3-ols yields. Moreover, the synthesized products conveniently transformed corresponding heterocycles 1,8-naphthyridinone or isochromenopyridinone core, which are privileged structures medicinal chemistry.

Язык: Английский

Процитировано

23

Rh(III)-Catalyzed Domino [4 + 2] Annulation/Aza-Michael Addition of N-(Pivaloyloxy)benzamides with 1,5-Enynes via C–H Activation: Synthesis of Functionalized Aromathecins DOI
Chada Raji Reddy,

Kathe Mallesh,

Srinivas Bodasu

и другие.

The Journal of Organic Chemistry, Год журнала: 2020, Номер 85(12), С. 7905 - 7915

Опубликована: Май 21, 2020

Reported herein are the Rh(III)-catalyzed cascade annulation reactions of N-(pivaloyloxy)benzamides with 1,5-enynes to access diversely substituted aromathecin derivatives involving C-H activation. The developed procedure offers an efficient synthetic tool for assembly a wide range and good atom economy functional group tolerance. key involved in this alkyne insertion aza-Michael addition under oxidant-free mild reaction conditions.

Язык: Английский

Процитировано

19