Kandimalla, Satheeshkumar Reddy published the artcileMetal-free C-N bond formations: one-pot synthesis of pyrido[2′,1′:2,3]imidazo[4,5-c]cinnolines, benzo[4′,5′]thiazolo- and thiazolo[2′,3′:2,3]imidazo[4,5-c]cinnolines, COA of Formula: C14H11BrN2, the main research area is imidazo heterocyclic cinnoline preparation regioselective; hydrazine imidazopyridinyl preparation oxidative arylation; imidazopyridine aryl diisopropyl azodicarboxylate hydrazination.
An efficient one-pot synthesis of novel pyrido[2′,1′:2,3]imidazo[4,5-c]cinnoline derivatives I (R1 = H, 10-CH3, 11-CH3, etc.; R2 = H, 3-Br, 3-OMe, etc.) has been achieved with moderate to good yields, with two C-N bond formations through C-H functionalization of 2-arylimidazo[1,2-a]pyridines II (R3 = H, 7-CH3, 8-CH3, etc.; R4 = H, 4-Br, 2,4-Cl2, etc.). The reaction proceeds via C-3 regioselective hydrazination with diisopropyl azodicarboxylate followed by oxidative N-arylation mediated by phenyliodine(III) diacetate (PIDA) in trifluoroacetic acid by means of C-H functionalization to produce pyrido[2′,1′:2,3]imidazo[4,5-c]cinnolines I. Other imidazoheterocycles such as 2-arylbenzo[d]imidazo[2,1-b]thiazoles and 6-arylimidazo[2,1-b]thiazoles, e.g., III, underwent similar transformations giving the corresponding cinnolines, e.g., IV, under transition metal-free and mild conditions.
RSC Advances published new progress about Addition reaction (hydrazination). 1023-01-4 belongs to class imidazoles-derivatives, name is 2-(4-Bromophenyl)-6-methylimidazo[1,2-a]pyridine, and the molecular formula is C14H11BrN2, COA of Formula: C14H11BrN2.
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem