Silver-Catalyzed Cascade Cyclization for the Synthesis of 4-Aminotetrahydrocarbazole DOI
Jingjing Zhang, Xinxin Xu, Kangkang Yang

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

A silver-catalyzed cascade cyclization strategy has been developed for the synthesis of 4-aminotetrahydrocarbazole, a common core structure found in various alkaloids. This target molecule can be synthesized through one-step tandem reaction, thereby eliminating need prior tetrahydrocarbazole. Furthermore, use chiral

Language: Английский

Recent advances in radical-mediated intermolecular (4 + 2) cycloaddition DOI

Xue‐Er Cai,

Ziying Wang,

Wen‐Chan Tian

et al.

Organic & Biomolecular Chemistry, Journal Year: 2023, Volume and Issue: 21(30), P. 6068 - 6082

Published: Jan. 1, 2023

On the basis of types radicals that initiate different intermolecular (4 + 2) cycloaddition processes, we classify them into five types, and this review places special emphasis on reaction design mechanisms.

Language: Английский

Citations

9
Hydrogen Production from Water Splitting with 2,4,6-Triphenylpyrylium Modified on B-Doped N-Deficient Carbon Nitride Nanostructures DOI

Tania Tofaz,

Ikram Ullah, Sadia Habib

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(13), P. 15675 - 15684

Published: June 21, 2024

A solar-driven hydrogen production process using a graphitic carbon nitride (CN) photocatalyst is an ideal future clean energy source. However, efficiency in the CN photocatalytic system still limited due to rapid electron–hole (e−/h+) recombination. Herein, we report efficient BCN-TPP by introducing 2,4,6-triphenylpyrylium (TPP) boron-doped nitrogen-deficient (BCN) through π–π interaction and π–cation interaction. The as-prepared shows increased visible light absorption narrow band gap, enhancing separation of photogenerated e–/h+ pairs. TPP acts as redox mediator under excitation that can accept electrons from BCN, then transfer them Pt cocatalyst. Photoluminescence (PL), electron paramagnetic resonance (EPR), other electrochemical studies have exhibited significantly enhances charge carrier separation. (10 wt % TPP) nanostructures achieved H2 generation rate 110.33 μmol h–1 at illumination (λ ≥ 420 nm), which 9.59 times higher than pristine C3N4 (11.50 h–1) apparent quantum (AQE) 6.03% 450 nm. Moreover, stability evolution over 4 cycles without any significant decline. This study represents approach for designing nanoheterostructured photocatalysts water splitting.

Language: Английский

Citations

2
Synthesis of Indole‐Fused 1,4‐Diazepinones via Photoredox‐Catalyzed Cascade Cyclization Reaction DOI Creative Commons
Elisa Brambilla,

Silvia Meraviglia,

Edoardo Moneta

et al.

Advanced Synthesis & Catalysis, Journal Year: 2023, Volume and Issue: 365(22), P. 3958 - 3966

Published: Oct. 6, 2023

Abstract A photoredox‐promoted approach for the synthesis of [1,4]diazepino[1,7‐ a ]indol‐6(7 H )‐ones starting from N ‐indolyl phenylacrylamides and aroyl chlorides as radical source is reported. This method, that involves cascade addition on C−C double bond followed by intramolecular cyclization at indole C2‐position, affords two diastereomeric indole‐fused 1,4‐diazepinones characterized N−C(aryl) axial chirality in yields ranging 51 to 99%.

Language: Английский

Citations

5
Cascade hydroarylation/Diels–Alder cycloaddition of alkynylindoles with electron-deficient alkynes and alkenes DOI

Guang-Chao Feng,

Jun-Chi Li,

Huang Xiang

et al.

Chemical Communications, Journal Year: 2023, Volume and Issue: 60(3), P. 328 - 331

Published: Dec. 4, 2023

Herein, a novel cascade gold(I)-catalyzed hydroarylation of alkynylindoles and subsequent Diels-Alder cycloaddition with electron-deficient alkynes alkenes is described. A variety azepino-fused hydrocarbazoles carbazoles were obtained in moderate to excellent yields. Key features this methodology are low catalyst loadings, high regioselectivity, broad functional group tolerances, access important heterocycles, 100% atom economy.

Language: Английский

Citations

4
Access to tetrahydrocarbazoles via a photocatalyzed cascade decarboxylation/addition/cyclization reaction DOI
Shuai Han, Zhang Chen, Yu Guo

et al.

Organic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(23), P. 6694 - 6699

Published: Jan. 1, 2024

An efficient photocatalyzed decarboxylative coupling of indolepropionic acid NHPI esters with α,β-unsaturated carbonyl compounds has been developed, which provided structurally diverse tetrahydrocarbozles in moderate to good yields.

Language: Английский

Citations

1
In(OTf)3-Catalyzed Formal (4 + 3) Cycloaddition Reactions of 3-Benzylideneindoline-2-thiones with 2-Indolylmethanols DOI

Xuelong Wang,

Yi Yang, Yan Jiang

et al.

Organic & Biomolecular Chemistry, Journal Year: 2024, Volume and Issue: 22(29), P. 5902 - 5906

Published: Jan. 1, 2024

We report the In(OTf)

Language: Английский

Citations

0
Silver-Catalyzed Cascade Cyclization for the Synthesis of 4-Aminotetrahydrocarbazole DOI
Jingjing Zhang, Xinxin Xu, Kangkang Yang

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

A silver-catalyzed cascade cyclization strategy has been developed for the synthesis of 4-aminotetrahydrocarbazole, a common core structure found in various alkaloids. This target molecule can be synthesized through one-step tandem reaction, thereby eliminating need prior tetrahydrocarbazole. Furthermore, use chiral

Language: Английский

Citations

0