42869-47-6Relevant academic research and scientific papers
CONDENSED HETEROCYCLIC COMPOUND
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Paragraph 0390; 0403, (2019/03/13)
Provided is a compound represented by the following formula, or a salt thereof: [wherein each symbol is as defined herein.].
Heterocyclisation via Selective Elimination: Reaction of 2,3-Diaminopyridine with Acyclic Ketones under Thermal Conditions
Dubey, Pramod Kumar,Ratnam, C. V.
, p. 863 - 865 (2007/10/02)
Reactions of 2,3-diaminopyridine and its 5-bromo analogue with three symmetrical and nine unsymmetrical acyclic ketones under thermal conditions have been studied.The reactions have yielded 2-substituted-1H-imidazopyridines by the elimination of one of the C2-substituents from the probable, though unisolated, intermediates 2,2-disubstituted-2,3-dihydro-1H-imidazopyridine derivatives.Elimination of one of the groups in the case of symmetrical ketones and preferentially of benzyl group in the case of benzyl methyl ketone has been observed.All the three alkyl phenyl ketones studied afford 2-phenylimidazopyridine by the selective loss of the alkyl group.Elimination of branched alkyl group has been noticed in the reactions involving methyl t-butyl and methyl i-propyl ketones, while the preferential elimination of methyl group is observed in the case of methyl n-alkyl ketones.Suitable explanations have been offered for the observed selective eliminations.
