UV-induced radical formation and isomerization of 4-methoxyindole and 5-methoxyindole

2020 ◽  
Vol 22 (40) ◽  
pp. 22943-22955 ◽  
Author(s):  
A. J. Lopes Jesus ◽  
Mário T. S. Rosado ◽  
R. Fausto ◽  
I. Reva
Keyword(s):  
Bond Cleavage ◽  
Radical Formation ◽  
Uv Excitation

UV-excitation of matrix-isolated methoxyindoles induces the N–H bond cleavage resulting in indolyl radicals. These, in turn, recombine with the released H atom to form 3H-tautomers.

Radical C‒N Borylation of Aromatic Amines Enabled by a Pyrylium Reagent

2019 ◽  
Author(s):  
Yuanhong Ma ◽  
Yue Pang ◽  
jan niski ◽  
Markus Leutzsch ◽  
Josep Cornella
Keyword(s):  
Aromatic Amines ◽  
Driving Force ◽  
Bond Cleavage ◽  
Radical Reaction ◽  
Radical Formation ◽  
Planar Structure ◽  
Amino Group ◽  
Aryl Radical ◽  
Electronic Environment

Herein, we report a radical borylation of aromatic amines through a homolytic C(sp2)‒N bond cleavage. This method capitalizes on a simple and mild activation via a pyrylium reagent (ScPyry-OTf) thus priming the amino group for reactivity. The combination of terpyridine and a diboron reagent triggers a radical reaction which cleaves the C(sp2)‒N bond and forges a new C(sp2)‒B bond. The unique non-planar structure of the pyridinium intermediate, provides the necessary driving force for the aryl radical formation. The method permits borylation of a wide variety of aromatic amines indistinctively of the electronic environment.<br>

scholarly journals UV and VUV-induced fragmentation of tin-oxo cage ions

2021 ◽  
Vol 23 (37) ◽  
pp. 20909-20918
Author(s):  
Jarich Haitjema ◽  
Lianjia Wu ◽  
Alexandre Giuliani ◽  
Laurent Nahon ◽  
Sonia Castellanos ◽  
...  
Keyword(s):  
Bond Cleavage ◽  
Covalent Bonds ◽  
Uv Excitation

Tin-oxo cage ions undergo Sn–C bond cleavage upon (V)UV excitation. Counterions influence further fragmentation, as they form covalent bonds to the cage.

scholarly journals Radical C‒N Borylation of Aromatic Amines Enabled by a Pyrylium Reagent

2019 ◽  
Author(s):  
Yuanhong Ma ◽  
Yue Pang ◽  
jan niski ◽  
Markus Leutzsch ◽  
Josep Cornella
Keyword(s):  
Aromatic Amines ◽  
Driving Force ◽  
Bond Cleavage ◽  
Radical Reaction ◽  
Radical Formation ◽  
Planar Structure ◽  
Amino Group ◽  
Aryl Radical ◽  
Electronic Environment

Herein, we report a radical borylation of aromatic amines through a homolytic C(sp2)‒N bond cleavage. This method capitalizes on a simple and mild activation via a pyrylium reagent (ScPyry-OTf) thus priming the amino group for reactivity. The combination of terpyridine and a diboron reagent triggers a radical reaction which cleaves the C(sp2)‒N bond and forges a new C(sp2)‒B bond. The unique non-planar structure of the pyridinium intermediate, provides the necessary driving force for the aryl radical formation. The method permits borylation of a wide variety of aromatic amines indistinctively of the electronic environment.<br>

Mg–Mg bond polarization induced by a superbulky β-diketiminate ligand

2020 ◽  
Vol 56 (77) ◽  
pp. 11402-11405
Author(s):  
Bastian Rösch ◽  
Thomas Xaver Gentner ◽  
Jonathan Eyselein ◽  
Alexander Friedrich ◽  
Jens Langer ◽  
...  
Keyword(s):  
Bond Cleavage ◽  
Radical Formation ◽  
Low Valent ◽  
Bond Polarization

Increasing the steric pressure in a low-valent β-diketiminate Mg(i) did not lead to radical formation but gave Mg–N bond cleavage and formation of an asymmetrically substituted Mg–Mg complex.

Amidinyl Radical Formation through Anodic N−H Bond Cleavage and Its Application in Aromatic C−H Bond Functionalization

2016 ◽  
Vol 129 (2) ◽  
pp. 602-605 ◽  
Author(s):  
Huai-Bo Zhao ◽  
Zhong-Wei Hou ◽  
Zhan-Jiang Liu ◽  
Ze-Feng Zhou ◽  
Jinshuai Song ◽  
...  
Keyword(s):  
Bond Cleavage ◽  
Radical Formation ◽  
Bond Functionalization

Amidinyl Radical Formation through Anodic N−H Bond Cleavage and Its Application in Aromatic C−H Bond Functionalization

2016 ◽  
Vol 56 (2) ◽  
pp. 587-590 ◽  
Author(s):  
Huai-Bo Zhao ◽  
Zhong-Wei Hou ◽  
Zhan-Jiang Liu ◽  
Ze-Feng Zhou ◽  
Jinshuai Song ◽  
...  
Keyword(s):  
Bond Cleavage ◽  
Radical Formation ◽  
Bond Functionalization
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