135056-04-1Relevant articles and documents
Imidazopyridinium and pyridopyrimidium bromides: Synthesis and hydrolysis
Huang, Kevin S.,Haddadin, Makhluf J.,Kurth, Mark J.
, p. 2382 - 2385 (2007/10/03)
The reactions of symmetrical and unsymmetrical 2,2′-dipyridylamines with 1,2-dibromoethane and 1,3-dibromopropane give imidazopyridinium and pyridopyrimidium bromides, respectively. These acetone/CH2Cl2 -insoluble, highly fluorescent quaternary ammonium salts undergo addition/ring opening upon treatment with methanolic KOH to give pyridin-2-one derivatives. A sequential N,N-dialkylation/ring-opening hydrolysis/N,N-dialkylation/ring-opening hydrolysis strategy was developed for the construction of unsymmetrical bis(pyridin-2-ones).