58171-11-2Relevant articles and documents
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.
Pyridinylidene guanidines
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, (2008/06/13)
Compounds having the structure EQU1 and the pharmaceutically acceptable salts thereof, wherein R1 and R2 are the same or different and are selected from alkyl, cycloalkyl, aryl and arylalkyl; R3 is hydrogen, halogen, trifl