Red fluorescent zwitterionic naphthalenediimides with di/mono-benzimidazolium and a negatively-charged oxygen substituents

2021 ◽  
Author(s):  
Chunqin Wang ◽  
Songyan Han ◽  
Tianbao Wang ◽  
Xuesong Zheng ◽  
Linsen Zhou ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Polar Solvents ◽  
Red Fluorescence ◽  
Benzimidazolium Salt

The C‒H/C‒X cross-coupling of a benzimidazolium salt with 2Br-NDI afforded two unprecedented zwitterionic NDIs with di/mono-benzimidazolium and an extra negatively-charged oxygen substituents. They exhibited intensified red fluorescence in polar solvents...

C–Te Cross-Coupling of Diaryl Ditellurides with Arylboronic Acids by Using Copper(I) Thiophene-2-carboxylate under Mild Conditions

Synlett ◽  
2018 ◽  
Vol 30 (01) ◽  
pp. 99-103 ◽  
Author(s):  
Shinichi Koguchi ◽  
Yuga Shibuya ◽  
Yusuke Igarashi ◽  
Haruka Takemura
Keyword(s):  
Room Temperature ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Polar Solvents ◽  
Arylboronic Acids ◽  
Mild Conditions ◽  
Cross Coupling Reaction ◽  
Neutral Conditions

We describe the successful cross-coupling of diaryl ditellurides with arylboronic acids by using copper(I) thiophene-2-carboxylate (CuTC) under mild conditions. Although other studies have reported that highly polar solvents (such as DMSO) or bases are required, this reaction was completed by using CuTC and common solvents under neutral conditions at room temperature. This cross-coupling reaction was performed with diaryl ditellurides and arylboronic acids bearing various groups, affording the corresponding diaryl tellurides in good to excellent yields.

scholarly journals Non-C2-Symmetric Bis-Benzimidazolium Salt Applied in the Synthesis of Sterically Hindered Biaryls

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6703
Author(s):  
Yen-Hsin Chen ◽  
Shu-Jyun Huang ◽  
Tung-Yu Hsu ◽  
Pei-Yu Hung ◽  
Ting-Rong Wei ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Good Yield ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
High Efficacy ◽  
Ethylene Bridge ◽  
Aryl Chlorides ◽  
Cross Coupling Reaction ◽  
Benzimidazolium Salt ◽  
Sterically Hindered

A novel non-C2-symmetric bis-benzimidazolium salt derived from (±)-valinol has been prepared by a simple and straightforward process in good yield. The structure of bis-benzimidazolium salt provided a bulky steric group on the ethylene bridge; which facilitates the catalytic efficacy in the C(sp2)–C(sp2) formation. Its catalytic activity in Suzuki–Miyaura cross-coupling reaction of unactivated aryl chlorides has been found to have high efficacy in 1 mol% Pd loading. This protocol demonstrated the potential on the synthesis of sterically hindered biaryls.

Photoredox/Pd dual-catalytic three-component cross-coupling

2020 ◽  
Author(s):  
Logan Forshee ◽  
Kaitie Cartwright ◽  
Jon Tunge ◽  
Megan Hegarty
Keyword(s):  
Cross Coupling
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