419557-33-8Relevant academic research and scientific papers
CuCl2-catalyzed N[sbnd]O bond cleavage of oxime esters: Approach to imidazoheterocycles and furo[3,2-c]chromenyl fused imidazoles
Gudimella, Santosh K.,Kaur, Amanpreet,Kumar, Ram,Samanta, Sampak
, (2020/07/08)
An articulate approach to a diverse set of imidazoheterocycles in good to high yields via a copper-catalyzed aza-annulation of several oxime esters with a group of 2-amino-azaarenes was developed. The above cyclization reaction probably proceeds via a single electron transfer process which embodies a new technique for creating two new C[sbnd]N bonds for imidazole ring synthesis. Gratifyingly, the implementation of this chemistry could be further stretched to the synthesis of a novel class of fused imidazoles bearing a furo[3,2-c]chromene moiety via a sequential C[sbnd]N bond formation, followed by C(sp2)-H functionalization/5-endo-dig-oxacyclization (C[sbnd]C and C[sbnd]O bonds) of in situ produced fused imidazoles with cyclic enynones in the presence of copper(II) as a π-electrophilic Lewis acid catalyst.
Regioselective direct c-3 arylation of imidazo[1,2- a ]pyridines with aryl tosylates and mesylates promoted by palladium-phosphine complexes
Choy, Pui Ying,Luk, Kwan Chak,Wu, Yinuo,So, Chau Ming,Wang, Lai-Lai,Kwong, Fuk Yee
, p. 1457 - 1463 (2015/02/19)
Direct C-3 arylation of imidazo[1,2-a]pyridines with aryl tosylates and mesylates has been accomplished by employing palladium(II) acetate associated with SPhos (2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl) or L1 (2-(2-(diisopropylphosphino)phenyl)-1-methyl-1H-indole). This catalyst system can be applied to a wide range of aryl sulfonates and shows excellent C-3 regioselectivity of imidazo[1,2-a]pyridine. These results represent the first examples of using tosylate- and mesylate-functionalized arenes as the electrophile partners for this regioselective direct arylation.
IMIDAZOPYRIDINE DERIVATIVES AND ORGANIC ELECTROLUMINESCENT ELEMENTS CONTAINING SAME
-
Paragraph 0091, (2013/06/06)
An imidazopyridine derivative shown by the following formula (1).
Substituted imidazo[1,2-A] pyridine derivatives
-
, (2008/06/13)
The present invention is a series of novel compounds of formula I and a method of treatment or prevention of a mGluR5 receptor mediated disease by administering an therapeutically effective amount of a compound formula 1wherein R1 and R2 are selected from hydrogen, (C1-6)-alkyl, halogen, hydroxy, (C1-6)-alkoxy and A is defined the description, or a pharmaceutically acceptable salt thereof.
