scholarly journals in   situ Formation of RSCl/ArSeCl and Their Oxidative Coupling with Enaminone Derivatives Under Transition‐metal Free Conditions

2019 ◽  
Vol 361 (21) ◽  
pp. 4926-4932 ◽  
Author(s):  
Zhenhua Shang ◽  
Qingyu Chen ◽  
Linlin Xing ◽  
Yilin Zhang ◽  
Laura Wait ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxidative Coupling ◽  
Metal Free ◽  
In Situ Formation

Insertion Reaction of 2-Halo-N-allylanilines with K2S Involving Trisulfur Radical Anion: Synthesis of Benzothiazole Derivatives under Transition-Metal-Free Conditions

Synthesis ◽  
2020 ◽  
Author(s):  
Yan-Wei Zhao ◽  
Shun-Yi Wang ◽  
Xin-Yu Liu ◽  
Tian Jiang ◽  
Weidong Rao
Keyword(s):  
Transition Metal ◽  
Radical Anion ◽  
Radical Cyclization ◽  
Transition Metal Catalysis ◽  
Insertion Reaction ◽  
Metal Catalysis ◽  
Metal Free ◽  
Benzothiazole Derivatives

AbstractA synthesis of benzothiazole derivatives through the reaction of 2-halo-N-allylanilines with K2S in DMF is developed. The trisulfur radical anion S3·–, which is generated in situ from K2S in DMF, initiates the reaction without transition-metal catalysis or other additives. In addition, two C–S bonds are formed and heteroaromatization of benzothiazole is triggered by radical cyclization and H-shift.

Recent Developments in Transition-Metal-Free Functionalization and Derivatization Reactions of Pyridines

Synlett ◽  
2020 ◽  
Author(s):  
Lei Jiao ◽  
Fei-Yu Zhou
Keyword(s):  
Transition Metal ◽  
Structural Motif ◽  
Metal Exchange ◽  
Coupling Reactions ◽  
Phosphonium Salts ◽  
Metal Free ◽  
Radical Coupling ◽  
In Situ Activation ◽  
Recent Developments

AbstractPyridine is an important structural motif that is prevalent in natural products, drugs, and materials. Methods that functionalize and derivatize pyridines have gained significant attention. Recently, a large number of transition-metal-free reactions have been developed. In this review, we provide a brief summary of recent advances in transition-metal-free functionalization and derivatization reactions of pyridines, categorized according to their reaction modes.1 Introduction2 Metalated Pyridines as Nucleophiles2.1 Deprotonation2.2 Halogen–Metal exchange3 Activated Pyridines as Electrophiles3.1 Asymmetric 2-Allylation by Chiral Phosphite Catalysis3.2 Activation of Pyridines by a Bifunctional Activating Group3.3 Alkylation of Pyridines by 1,2-Migration3.4 Alkylation of Pyridines by [3+2] Addition3.5 Pyridine Derivatization by Catalytic In Situ Activation Strategies3.6 Reactions via Heterocyclic Phosphonium Salts4 Radical Reactions for Pyridine Functionalization4.1 Pyridine Functionalization through Radical Addition Reactions4.2 Pyridine Functionalization through Radical–Radical Coupling Reactions5 Derivatization of Pyridines through the Formation of Meisenheimer-Type Pyridyl Anions6 Conclusion

Iodine mediated oxidative cross coupling of 2-aminopyridine and aromatic terminal alkyne: a practical route to imidazo[1,2-a]pyridine derivatives

2019 ◽  
Vol 17 (26) ◽  
pp. 6441-6449 ◽  
Author(s):  
Surya Kanta Samanta ◽  
Mrinal K. Bera
Keyword(s):  
Transition Metal ◽  
Oxidative Coupling ◽  
Cross Coupling ◽  
Terminal Alkyne ◽  
Pyridine Derivatives ◽  
Metal Free

A novel, transition-metal free route leading to imidazo[1,2-a]pyridine derivatives via iodine mediated oxidative coupling between 2-aminopyridine and aromatic terminal alkyne has been demonstrated.

scholarly journals In-situ formation, thermal decomposition, and adsorption studies of transition metal carbonyl complexes with short-lived radioisotopes

2014 ◽  
Vol 102 (12) ◽  
Author(s):  
Julia Even ◽  
Alexander Yakushev ◽  
Christoph Emanuel Düllmann ◽  
Jan Dvorak ◽  
Robert Eichler ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Transition Metal ◽  
Metal Carbonyl ◽  
Carbonyl Complexes ◽  
Adsorption Studies ◽  
Metal Carbonyl Complexes ◽  
In Situ Formation

AbstractWe report on the

ChemInform Abstract: In situ Formation of NOx and Br Anion for Aerobic Oxidation of Benzylic Alcohols Without Transition Metal.

ChemInform ◽  
2010 ◽  
Vol 41 (24) ◽  
pp. no-no
Author(s):  
Guanyu Yang ◽  
Wei Wang ◽  
Weimin Zhu ◽  
Cunbin An ◽  
Xinqin Gao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Aerobic Oxidation ◽  
Benzylic Alcohols ◽  
In Situ Formation

ChemInform Abstract: In situ Generation of PhI+CF3and Transition-Metal-Free Oxidative sp2C-H Trifluoromethylation.

ChemInform ◽  
2013 ◽  
Vol 44 (48) ◽  
pp. no-no
Author(s):  
Cong Xu ◽  
Jingxin Liu ◽  
Wenbo Ming ◽  
Yingjie Liu ◽  
Jun Liu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Free ◽  
In Situ Generation
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