Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Organic Chemistry called Reaction of 3-substituted imidazo[1,2-a]pyridines with bromine(1+) and the alleged 5-bromo-substituted product, Author is Hand, E. Smakula; Paudler, William W., which mentions a compound: 3400-55-3, SMILESS is CC(Br)C(OCC)OCC, Molecular C7H15BrO2, Reference of 2-Bromopriopionaldehydediethylacetal.
The reaction of 3-methylimidazo[1,2-a]pyridine with N-bromosuccinimide (I) gave products formed by apparent nucleophilic substitution at the 2-position. I in CHCl3 gave II and III, while I in CCl4 or Br2 in CHCl3 gave II exclusively. Mechanisms and differences in product formation are discussed; evidence is presented that the previously reported I product was in fact 3-bromo-5-methylimidazo[1,2-a]pyridine, rather than the alleged 5-bromo-3-Me derivative IV. IV was prepared by diazotization of 5-amino-3-methylimidazo[1,2-a]pyridine in the presence of HBr and by condensation of MeCHBrCHO (or its acetal) with 2-amino-6-bromopyridine.
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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics