The Ullmann Coupling Reaction:  A New Approach to Tetraarylstannanes

2006 ◽  
Vol 25 (17) ◽  
pp. 4207-4214 ◽  
Author(s):  
Nadim S. Shaikh ◽  
Sean Parkin ◽  
Hans-Joachim Lehmler
Keyword(s):  
Coupling Reaction ◽  
New Approach ◽  
Ullmann Coupling

scholarly journals The Ullmann Coupling Reaction: A New Approach to Tetraarylstannanes.

ChemInform ◽  
2006 ◽  
Vol 37 (51) ◽  
Author(s):  
Nadim S. Shaikh ◽  
Sean Parkin ◽  
Hans-Joachim Lehmler
Keyword(s):  
Coupling Reaction ◽  
New Approach ◽  
Ullmann Coupling

Visualizing and Understanding Ordered Surface Phases during the Ullmann Coupling Reaction

2021 ◽  
Vol 125 (14) ◽  
pp. 7675-7685
Author(s):  
Tedros A. Balema ◽  
Jiayuan Miao ◽  
Natalie A. Wasio ◽  
Colin J. Murphy ◽  
Amanda M. Larson ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Surface Phases ◽  
Ullmann Coupling

Fabrication of silica nanoparticle-supported copper quantum dots and the efficient catalytic Ullmann coupling reaction

2017 ◽  
Vol 102 ◽  
pp. 118-122 ◽  
Author(s):  
Aiqin Gao ◽  
Hongjuan Zhang ◽  
Liu Hu ◽  
Aiqin Hou ◽  
Kongliang Xie
Keyword(s):  
Quantum Dots ◽  
Coupling Reaction ◽  
Silica Nanoparticle ◽  
Ullmann Coupling

A new approach to (+)-brefeldin A via a nickel-catalyzed coupling reaction of cyclopentenyl acetate and lithium 2-furylborate

1996 ◽  
Vol 37 (34) ◽  
pp. 6125-6128 ◽  
Author(s):  
Yuichi Kobayashi ◽  
Kengo Watatani ◽  
Yuusuke Kikori ◽  
Ryo Mizojiri
Keyword(s):  
Brefeldin A ◽  
Coupling Reaction ◽  
New Approach

Divergent Synthesis of Indole-2-carboxylic Acid Derivatives via Ligand-free Copper-catalyzed Ullmann Coupling Reaction

Heterocycles ◽  
2019 ◽  
Vol 98 (7) ◽  
pp. 904
Author(s):  
Jianjun Li ◽  
Jiadi Zhou ◽  
Yongjian Chen ◽  
Junsong Huang
Keyword(s):  
Carboxylic Acid ◽  
Coupling Reaction ◽  
Ligand Free ◽  
Ullmann Coupling

scholarly journals Synthesis of Functionalized Cannabilactones

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 684
Author(s):  
Yingpeng Liu ◽  
Thanh C. Ho ◽  
Mohammed Baradwan ◽  
Maria Pascual Lopez-Alberca ◽  
Christos Iliopoulos-Tsoutsouvas ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
New Approach ◽  
Structural Modifications ◽  
Cross Coupling Reaction ◽  
One Step

A new approach to synthesize cannabilactones using Suzuki cross-coupling reaction followed by one-step demethylation-cyclization is presented. The two key cannabilactone prototypes AM1710 and AM1714 were obtained selectively in high overall yields and in a lesser number of synthetic steps when compared to our earlier synthesis. The new approach expedited the synthesis of cannabilactone analogs with structural modifications at the four potential pharmacophoric regions.

scholarly journals A new approach to silicon rhodamines by Suzuki–Miyaura coupling – scope and limitations

2019 ◽  
Vol 15 ◽  
pp. 2569-2576 ◽  
Author(s):  
Thines Kanagasundaram ◽  
Antje Timmermann ◽  
Carsten S Kramer ◽  
Klaus Kopka
Keyword(s):  
Free Acid ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Stimulated Emission ◽  
New Approach ◽  
Cross Coupling Reaction ◽  
Optimal Coupling ◽  
Sensor Molecules ◽  
Optimized Conditions ◽  
Coupling Partner

Background: Silicon rhodamines are of particular interest because of their advantageous dye properties (fluorescence- and biostability, quantum efficiency, tolerance to photobleaching). Therefore, silicon rhodamines find frequent application in STED (stimulated emission depletion) microscopy, as sensor molecules for, e.g., ions and as fluorophores for the optical imaging of tumors. Different strategies were already employed for their synthesis. Because of just three known literature examples in which Suzuki–Miyaura cross couplings gave access to silicon rhodamines in poor to moderate yields, we wanted to improve these first valuable experimental results. Results: The preparation of the xanthene triflate was enhanced and several boron sources were screened to find the optimal coupling partner. After optimization of the palladium catalyst, different substituted boroxines were assessed to explore the scope of the Pd-catalyzed cross-coupling reaction. Conclusions: A number of silicon rhodamines were synthesized under the optimized conditions in up to 91% yield without the necessity of HPLC purification. Moreover, silicon rhodamines functionalized with free acid moieties are directly accessible in contrast to previously described methods.

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