scholarly journals A Modular Synthesis of Substituted Cycloparaphenylenes

2022 ◽  
Author(s):  
Daniel Kohrs ◽  
Jonathan Becker ◽  
Hermann Andreas Wegner
Keyword(s):  
Modular Synthesis

Tris(pyrazolyl)borate Copper Hydroxide Complexes Featuring Tunable Intramolecular H-bonding

2019 ◽  
Author(s):  
Evan Gardner ◽  
Caitlyn Cobb ◽  
Jeffery A. Bertke ◽  
Timothy H. Warren
Keyword(s):  
Single Crystal ◽  
Copper Hydroxide ◽  
X Ray ◽  
Modular Synthesis ◽  
Pendant Arm ◽  
Copper Center ◽  
Vibrational Studies

A modular synthesis provides access to a series of new tris(pyrazolyl)borate ligands <sup>XpyMe</sup>TpK that possess a single functionalized pendant pyridyl (py) or pyrimidyl (pyd) arm designed to engage in tunable intramolecular H-bonding to metal–bound functionalities. To illustrate such H-bonding interactions, a series of [<sup>XpyMe</sup>TpCu]<sub>2</sub>(𝜇–OH)<sub>2</sub>(<b>6a</b><b>–6e</b>) complexes were synthesized from the corresponding <sup>XpyMe</sup>TpCu–OAc (<b>5a–5e</b>) complexes. Single crystal X-ray structures of three new dinuclear [<sup>XpyMe</sup>TpCu]<sub>2</sub>(𝜇–OH)<sub>2</sub>complexes reveal H-bonding between the pendant heterocycle and bridging hydroxide ligands while the donor arm engages the copper center in an unusual monomeric <sup>DMAPMe</sup>TpCu–OH complex. Vibrational studies (IR) of each bridging hydroxide complex reveal reduced 𝜈<sub>OH </sub>frequencies that tracks with the H-bond accepting ability of the pendant arm.

Tris(pyrazolyl)borate Copper Hydroxide Complexes Featuring Tunable Intramolecular H-bonding

2019 ◽  
Author(s):  
Evan Gardner ◽  
Caitlyn Cobb ◽  
Jeffery A. Bertke ◽  
Timothy H. Warren
Keyword(s):  
Single Crystal ◽  
Copper Hydroxide ◽  
X Ray ◽  
Modular Synthesis ◽  
Pendant Arm ◽  
Copper Center ◽  
Vibrational Studies

A modular synthesis provides access to a series of new tris(pyrazolyl)borate ligands <sup>XpyMe</sup>TpK that possess a single functionalized pendant pyridyl (py) or pyrimidyl (pyd) arm designed to engage in tunable intramolecular H-bonding to metal–bound functionalities. To illustrate such H-bonding interactions, a series of [<sup>XpyMe</sup>TpCu]<sub>2</sub>(𝜇–OH)<sub>2</sub>(<b>6a</b><b>–6e</b>) complexes were synthesized from the corresponding <sup>XpyMe</sup>TpCu–OAc (<b>5a–5e</b>) complexes. Single crystal X-ray structures of three new dinuclear [<sup>XpyMe</sup>TpCu]<sub>2</sub>(𝜇–OH)<sub>2</sub>complexes reveal H-bonding between the pendant heterocycle and bridging hydroxide ligands while the donor arm engages the copper center in an unusual monomeric <sup>DMAPMe</sup>TpCu–OH complex. Vibrational studies (IR) of each bridging hydroxide complex reveal reduced 𝜈<sub>OH </sub>frequencies that tracks with the H-bond accepting ability of the pendant arm.

Synthesis of Pyrrolo[1,2-a][1,6]- and [1,8]naphthyridines by Alkyne-Carbonyl Metathesis

Synthesis ◽  
2020 ◽  
Author(s):  
Peter Ehlers ◽  
Peter Langer ◽  
Marian Blanco Ponce ◽  
Silvio Parpart ◽  
Alexander Villinger ◽  
...  
Keyword(s):  
Heterocyclic Compounds ◽  
Metathesis Reaction ◽  
Synthetic Methodology ◽  
Facile Synthesis ◽  
Reaction Conditions ◽  
One Pot ◽  
Metal Free ◽  
Modular Synthesis

AbstractA concise and modular synthesis of pyrrolo[1,2-a][1,6]- and [1,8]naphthyridines by a one-pot two-step reaction consisting of electrophilic acylation followed by an alkyne-carbonyl-metathesis reaction as the final cyclization step is reported. This developed synthetic methodology allows the facile synthesis of these heterocyclic core structures in mainly high overall yields under metal-free conditions. Reaction conditions are carefully optimized and display a novel supplement to access these tricyclic heterocyclic compounds.

Modular Synthesis of 3-Substituted Isocoumarins via Silver-Catalyzed Aerobic Oxidation/6-Endo Heterocyclization of ortho-Alkynylbenzaldehydes

2021 ◽  
Author(s):  
Hao Wu ◽  
Yi-Chun Wang ◽  
Andrey Shatskiy ◽  
Qiu-Yan Li ◽  
Jian-Quan Liu ◽  
...  
Keyword(s):  
Aerobic Oxidation ◽  
Modular Synthesis ◽  
Convenient Access

A method involving silver-catalyzed aerobic oxidation/6-endo heterocyclization of ortho-alkynylbenzaldehydes to yield 3-substituted isocumarins is described. The developed protocol allows convenient access to a range of synthetically useful 3-substituted isocoumarins and...

Modular Synthesis of Amphiphilic Chitosan Derivatives Based on Copper-Free Click Reaction for Drug Delivery

2021 ◽  
pp. 120798
Author(s):  
Yu Tao ◽  
Ding Qu ◽  
Chunli Tian ◽  
Yingshuang Huang ◽  
Lingjing Xue ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Click Reaction ◽  
Chitosan Derivatives ◽  
Modular Synthesis

Modular synthesis of non-conjugated N-(quinolin-8-yl) alkenyl amides via cross-metathesis

Tetrahedron ◽  
2021 ◽  
pp. 132279
Author(s):  
Hui-Qi Ni ◽  
Zi-Qi Li ◽  
Van T. Tran ◽  
Keary M. Engle
Keyword(s):  
Modular Synthesis ◽  
Cross Metathesis

scholarly journals Modular Synthesis of Novel Macrocycles Bearing α,β-Unsaturated Chemotypes through a Series of One-Pot, Sequential Protocols

2016 ◽  
Vol 22 (20) ◽  
pp. 6755-6758 ◽  
Author(s):  
Salim Javed ◽  
Mahipal Bodugam ◽  
Jessica Torres ◽  
Arghya Ganguly ◽  
Paul R. Hanson
Keyword(s):  
One Pot ◽  
Modular Synthesis
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