1338248-79-5Relevant academic research and scientific papers
Metal-free, base catalyzed oxidative amination and denitration reaction: Regioselective synthesis of 3-arylimidazo[1,2-a]pyridines
Devi, Elango Sankari,Alanthadka, Anitha,Nagarajan, Subbiah,Sridharan, Vellaisamy,Maheswari, Chockalingam Uma
, p. 3485 - 3489 (2018)
A metal-free, regioselective strategy for the synthesis of 3-arylimidazo[1,2-a]pyridines from β-nitrostyrenes and 2-aminopyridines using triethylamine as the catalyst and H2O2 (30% aq.) as the oxidant is reported. The use of an inexp
Synthesis of Imidazo[1,2- a]pyridines: Triflic Anhydride-Mediated Annulation of 2 H-Azirines with 2-Chloropyridines
Vuillermet, Frédéric,Bourret, Joanick,Pelletier, Guillaume
, p. 388 - 402 (2020/12/23)
The discovery and optimization of a reaction between 2-chloropyridines and 2H-azirines producing imidazo[1,2-a]pyridines is described. The treatment of 2H-azirines with triflic anhydride (Tf2O) forms an electrophilic 1-trifloyl-aziridin-2-yl triflate spec
Facile synthesis of 3-substituted imidazo[1,2-: A] pyridines through formimidamide chemistry
Sivappa, Rasapalli,Sammeta, Vamshikrishna Reddy,Huang, Yanchang,Golen, James A.,Savinov, Sergey N.
, p. 29659 - 29664 (2019/10/01)
A facile entry to 3-aryl/alkenyl/alkynyl substituted imidazo[1,2-a]pyridines (3a-p, 6a-d & 9a-9e) has been developed from readily available benzyl/allyl/propargyl halides and 2-amino pyridines as substrates via formimidamide chemistry that is devoid of caustic or expensive reagents, such as transition metal complexes. Quantum chemical calculations performed to understand the underlying mechanism of the transformation revealed a preference for intramolecular Mannich-type addition over pericyclic 1,5-electrocyclization for the systems reported herein that enable a Baldwin allowed 5-exo-trig cyclization instead of a formally anti-Baldwin 5-endo-trig process.
Iron(II)-Based Metalloradical Activation: Switch from Traditional Click Chemistry to Denitrogenative Annulation
Roy, Satyajit,Khatua, Hillol,Das, Sandip Kumar,Chattopadhyay, Buddhadeb
, p. 11439 - 11443 (2019/07/17)
A unique concept for the intermolecular denitrogenative annulation of 1,2,3,4-tetrazoles and alkynes was discovered by using a catalytic amount of Fe(TPP)Cl and Zn dust. The reaction precludes the traditional, more favored click reaction between an organic azide and alkynes, and instead proceeds by an unprecedented metalloradical activation. The method is anticipated to advance access to the construction of important basic nitrogen heterocycles, which will in turn enable discoveries of new drug candidates.
