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12 Results Found

  • Article
  • Open Access
5 Citations
3,486 Views
17 Pages

6 November 2023

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous interstellar molecules. However, the formation mechanisms of PAHs and even the simplest cyclic aromatic hydrocarbon, benzene, are not yet fully understood. Recently, we reported the statistical a...

(This article belongs to the Topic Theoretical, Quantum and Computational Chemistry)
  • Article
  • Open Access
18 Citations
11,219 Views
9 Pages

10 August 2009

Microwave assisted CpCo(CO)2 catalyzed cross-cyclotrimerizations of 1,7,9,15-hexadecatetrayne with two different nitriles to give unsymmetrically substituted bis(tetrahydroisoquinolines) was studied. The reaction proceeded with a range of alkyl and a...

(This article belongs to the Special Issue Microwave Assisted Synthesis)
  • Article
  • Open Access
14 Citations
5,300 Views
13 Pages

Synthesis of Tri- and Disubstituted Fluorenols and Derivatives Thereof Using Catalytic [2+2+2] Cyclotrimerization

  • Ilaria Caivano,
  • Reinhard P. Kaiser,
  • Florian Schnurrer,
  • Jiří Mosinger and ,
  • Ivana Císařová,
  • David Nečas and
  • Martin Kotora
  • + 2 authors+ 0 author

9 November 2019

A method for regioselective synthesis of 2,4-disubstituted and more highly substituted fluorenols using catalytic [2+2+2]cyclotrimerization of mono- and disubstituted diynes with terminal alkynes was explored. In the former case, the preferential for...

  • Communication
  • Open Access
2 Citations
2,569 Views
8 Pages

5 February 2025

In this work, we demonstrated that air-stable Ni(0) complexes with phosphine ligands can effectively catalyze intramolecular cyclotrimerization of a triyne to a compound with a [7]helical indeno[2,1-c]fluorene skeleton. The obtained results are compa...

(This article belongs to the Section Catalysis in Organic and Polymer Chemistry)
  • Article
  • Open Access
2 Citations
2,289 Views
14 Pages

Iron/Rhodium Bimetallic Lewis Acid/Transition Metal Relay Catalysis for Alkynylation/Cyclotrimerization Sequential Reactions Toward Isoindolinone Derivatives from N,O-Cyclic Acetals

  • Sidi Mohamed Abdallahi,
  • Ewies Fawzy Ewies,
  • Mohamed El-Shazly,
  • Brahim Ould Elemine and ,
  • Abderrahmane Hadou,
  • Ata Martin Lawson,
  • Adam Daïch and
  • Mohamed Othman
  • + 3 authors+ 0 author

6 February 2025

A novel sequential one-pot bimetallic catalytic system combining Fe(III)-catalyzed alkynylation and a Rh(I)-catalyzed [2+2+2] reaction was successfully developed. The σ-Lewis acid properties of iron (III) and the π-Lewis acid properties of r...

(This article belongs to the Section Catalysis in Organic and Polymer Chemistry)
  • Article
  • Open Access
14 Citations
6,080 Views
11 Pages

2 November 2018

The catalytic activity of nickel complexes in hydrophosphination involving secondary phosphines is not a commonly studied transformation. Beyond a small number of stand-out examples, many reports in the literature focus on the use of simple nickel sa...

(This article belongs to the Special Issue First-Row Transition Metal Complexes)
  • Article
  • Open Access
8 Citations
4,009 Views
11 Pages

11 November 2022

Benzene is the simplest building block of polycyclic aromatic hydrocarbons and has previously been found in the interstellar medium. Several barrierless reaction mechanisms for interstellar benzene formation that may operate under low-temperature and...

(This article belongs to the Section Computational and Theoretical Chemistry)
  • Feature Paper
  • Article
  • Open Access
4 Citations
4,234 Views
8 Pages

7 February 2019

Cycloadditions have emerged as some of the most useful reactions for the formation of polycyclic compounds. The carbonylative cycloaddition of triynes can lead to carbonylative and non-carbonylative competitive pathways, each leading to the formation...

(This article belongs to the Section Organic Chemistry)
  • Feature Paper
  • Article
  • Open Access
3 Citations
4,912 Views
16 Pages

CpCo(III) Precatalysts for [2+2+2] Cycloadditions

  • Fabian Fischer,
  • Michael Eder and
  • Marko Hapke

Catalysts applied in cobalt-catalyzed cyclotrimerizations reactions in general rely on the use of Co(I) precatalysts or the in situ generation of Co(I) catalysts from Co(II) sources by reduction in the presence of steering ligands, often by addition...

(This article belongs to the Special Issue Cobalt Catalysis: Recent Progress and Developments)
  • Article
  • Open Access
4 Citations
5,078 Views
9 Pages

4 January 2019

We described a synthetic approach to bisphenol-based monocyanate esters based on mono-O-methylation of parental bisphenols followed by cyanation of the residual phenolic hydroxyl. Structures of the synthesized compounds were determined by the applica...

(This article belongs to the Section Organic Chemistry)
  • Article
  • Open Access
7 Citations
3,617 Views
11 Pages

Chemoenzymatic Synthesis of Select Intermediates and Natural Products of the Desferrioxamine E Siderophore Pathway

  • Katherine M. Hoffmann,
  • Jason S. Kingsbury,
  • Nathan L. March,
  • Yoojin Jang and ,
  • James H. Nguyen and
  • Miranda M. Hutt
  • + 1 author+ 0 author

20 September 2022

The NIS synthetase family of enzymes responsible for the biosynthesis of siderophores is increasingly associated with bacterial virulence. Proteins in this class represent outstanding potential drug targets, assuming that basic biochemical and struct...

(This article belongs to the Section Natural Products Chemistry)
  • Article
  • Open Access
10 Citations
4,675 Views
13 Pages

An Ab Initio Investigation on Relevant Oligomerization Reactions of Toluene Diisocyanate (TDI)

  • Ravikumar Thangaraj,
  • Béla Fiser,
  • Xuanbing Qiu,
  • Chuanliang Li and ,
  • Béla Viskolcz and
  • Milán Szőri
  • + 1 author+ 0 author

5 October 2022

2,4- and 2,6-isomers of toluene diisocyanates (2,4-TDI and 2,6-TDI) are important raw materials in the polyurethane industry. These reactive compounds associate even under ambient conditions to form oligomers, changing the physicochemical properties...