Rapid Base‐ and Metal‐Free Oxidative C‐H Cyclization for the Synthesis of Benzo[4,5]imidazo[1,2‐ a ]pyridine Derivatives

2019 ◽  
Vol 8 (9) ◽  
pp. 1659-1663
Author(s):  
Hae Eun Lee ◽  
Mi Jung Lee ◽  
Jin Kyoon Park
Keyword(s):  
Pyridine Derivatives ◽  
Metal Free

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 Recyclable anhydride catalyst for H2O2 oxidation: N-oxidation of pyridine derivatives

RSC Advances ◽  
2020 ◽  
Vol 10 (15) ◽  
pp. 9165-9171
Author(s):  
Ghellyn Gajeles ◽  
Se Mi Kim ◽  
Jong-Cheol Yoo ◽  
Kyung-Koo Lee ◽  
Sang Hee Lee
Keyword(s):  
Pyridine Derivatives ◽  
Metal Free ◽  
H2o2 Oxidation

Od-MA polymer is developed as the first metal-free, recyclable anhydride catalyst used for the N-oxidation of pyridines with H2O2.

Catalytic Metal-Free Intramolecular Acylcyanation: Synthesis of Functionalized Pyridine Derivatives Bearing Pendent Stereocenters

Synthesis ◽  
2016 ◽  
Vol 48 (20) ◽  
pp. 3567-3574 ◽  
Author(s):  
Hai-Jing Wang ◽  
Wei-Wei Liao ◽  
Gong-Feng Zou ◽  
Jia-Xin Wang ◽  
Shi-Qiang Zhang
Keyword(s):  
Pyridine Derivatives ◽  
Metal Free ◽  
Functionalized Pyridine ◽  
Catalytic Metal

A metal-free decarboxylative cyclization from natural α-amino acids to construct pyridine derivatives

2011 ◽  
Vol 13 (3) ◽  
pp. 578 ◽  
Author(s):  
Qiang Wang ◽  
Changfeng Wan ◽  
Yang Gu ◽  
Jintang Zhang ◽  
Lingfeng Gao ◽  
...  
Keyword(s):  
Amino Acids ◽  
Pyridine Derivatives ◽  
Metal Free ◽  
Decarboxylative Cyclization

Transition-Metal-Free Synthesis of Pyridine Derivatives by Thermal Cyclization of N-Propargyl Enamines

Synthesis ◽  
2020 ◽  
Vol 52 (07) ◽  
pp. 1113-1121 ◽  
Author(s):  
Yuya Chikayuki ◽  
Takakane Miyashige ◽  
Shiori Yonekawa ◽  
Akiko Kirita ◽  
Natsuko Matsuo ◽  
...  
Keyword(s):  
Transition Metal ◽  
Total Synthesis ◽  
Good Yield ◽  
Environmentally Friendly ◽  
Thermal Cyclization ◽  
Pyridine Derivatives ◽  
Atom Economy ◽  
Metal Free

A transition-metal-free synthesis of pyridine derivatives by 6-endo-dig cyclization of N-propargyl enamines was developed. This method is environmentally friendly and is a high atom economy reaction that is easily accessed to provide pyridine derivatives in moderate to good yield by heating N-propargyl enamines in solvent without additives. The total synthesis of onychine was achieved in 51% yield in only two steps by using this method.

scholarly journals Metal-free cross-dehydrogenative coupling approach for C-H bond functionalization of 2-phenyl pyridine derivatives in water

2018 ◽  
Vol 29 (3) ◽  
pp. e21423
Author(s):  
Gogu Venkata Surendra Babu ◽  
Parvathaneni Sai Prathima ◽  
Pullaiah C. Perumgani ◽  
Balasubramanian Sridhar ◽  
Tumula Venkateshwar Rao ◽  
...  
Keyword(s):  
Pyridine Derivatives ◽  
Bond Functionalization ◽  
Metal Free ◽  
Dehydrogenative Coupling ◽  
Coupling Approach
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