Benzannulation strategies for the synthesis of carbazoles, indolocarbazoles, benzocarbazoles, and carbolines

A Banerjee, S Kundu, A Bhattacharyya… - Organic Chemistry …, 2021 - pubs.rsc.org
Nitrogen-containing π-excessive aromatic heterocycles, in particular, carbazoles,
indolocarbazoles, benzocarbazoles, and carbolines have been considered the fundamental …

Recent Progress in the Synthesis of Heterocycles through Base Metal‐Catalyzed Acceptorless Dehydrogenative and Borrowing Hydrogen Approach

A Mondal, R Sharma, D Pal… - European Journal of …, 2021 - Wiley Online Library
Abstract Development in the area of acceptorless dehydrogenation (AD) and borrowing
hydrogen (BH) catalysis emerge as one of the potential tools for various C− C and C …

Recent advances in the synthesis of pyrrolo [1, 2-a] indoles and their derivatives

YG Shelke, PE Hande, SJ Gharpure - Organic & Biomolecular …, 2021 - pubs.rsc.org
The pyrrolo [1, 2-a] indole unit is a privileged heterocycle found in numerous natural
products and has been shown to exhibit diverse pharmacological properties. Thus, recent …

One-Pot Synthesis of Furo[3,4-c]indolo[2,1-a]isoquinolines through Rh(III)-Catalyzed Cascade Reactions of 2-Phenylindoles with 4-Hydroxy-2-alkynoates

Y Liu, Z Yang, R Chauvin, W Fu, Z Yao, L Wang… - Organic …, 2020 - ACS Publications
An efficient and regioselective synthesis of fused polycyclic furo [3, 4-c] indolo [2, 1-a]
isoquinolines through Rh (III)-catalyzed cascade C–H activation/annulation/lactonization of …

Scalable Rhodaelectro-Catalyzed Expedient Access to Seven-Membered Azepino[3,2,1-hi]indoles via [5 + 2] C–H/N–H Annulation

Y Yuan, J Zhu, Z Yang, SF Ni, Q Huang… - CCS …, 2022 - chinesechemsoc.org
We report the establishment of a rhodaelectro-catalyzed [5+ 2] N–H/C–H oxidative
annulation of alkynes by 7-arylindoles, enabling the synthesis of seven-membered azepino …

Chemodivergent Synthesis of Indeno[1,2-b]indoles and Isoindolo[2,1-a]indoles via Mn(III)-Mediated or Electrochemical Intramolecular Radical Cross …

P Lu, W Zhuang, L Lu, A Liu, Y Chen… - The Journal of …, 2022 - ACS Publications
Chemodivergent synthesis of indeno [1, 2-b] indoles and isoindolo [2, 1-a] indoles from the
same starting materials involving radical cross-dehydrogenative couplings have been …

A Lewis Acid-Catalyzed Cascade Synthesis of Fused N-Heterocycles from 2-Alkynylanilines and 2-Formylbenzonitriles: Unveiling Iminoisoindoloindolone and Its …

PJ Arandhara, A Chutia, S Biswas… - The Journal of Organic …, 2024 - ACS Publications
We herein reveal a streamlined synthesis of structurally fused 6-iminoisoindoloindolones via
a meticulously orchestrated cascade reaction. This process seamlessly intertwines 2 …

Access to 5 H-benzo [a] carbazol-6-ols and benzo [6, 7] cyclohepta [1, 2-b] indol-6-ols via rhodium-catalyzed C–H activation/carbenoid insertion/aldol-type cyclization

Y Yuan, X Guo, X Zhang, B Li, Q Huang - Organic Chemistry Frontiers, 2020 - pubs.rsc.org
The rhodium-catalyzed mono-ortho C–H activation/carbenoid insertion/aldol-type cyclization
of 3-aldehyde-2-phenyl-1H-indoles with diazo compounds has been developed. This …

Cascade annulative π-extension for the rapid construction of carbazole based polyaromatic hydrocarbons

S Kundu, A Banerjee, SC Pal, M Ghosh… - Chemical …, 2021 - pubs.rsc.org
A Brønsted acid catalyzed cascade benzannulation strategy for the one-pot synthesis of
densely populated poly-aryl benzo [a] carbazole architectures is disclosed from easily …

Synthesis of Indole-Fused Six-, Seven-, or Eight-Membered N,O-Heterocycles via Rhodium-Catalyzed NH-Indole-Directed C–H Acetoxylation/Hydrolysis/Annulation

G Pan, L Lu, W Zhuang, Q Huang - The Journal of Organic …, 2021 - ACS Publications
We report herein the facile synthesis of indole-fused six-, seven-, or eight-membered N, O-
heterocycles through rhodium-catalyzed C–H acetoxylation/hydrolysis/annulation. The …