Synthesis of 1,2-diamino imidazole derivatives by the reaction of benzaldehyde guanylhydrazone with α-haloalkyl aryl ketones |
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Authors: | A V Ivashchenko V T Lazareva E K Prudnikova S P Ivashchenko V G Rumyantsev |
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Institution: | (1) Scientific-Research Institute of Organic Intermediates and Dyes, 103787 Moscow |
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Abstract: | 2-Amino-1-benzylideneamino-4-arylimidazoles were obtained by the reaction of benzaldehyde guanylhydrazone with 4-alkyl- and 4-aryl- -haloacetophenones. Side products of this reaction were cis- and trans-1,1 -bis(benzylideneamino)-4,4 -diaryl-2,2 -azoimidazoles. The corresponding 2-amino-1-benzylideneaminoimidazole and 1-benzyl-ideneaminoimidazol,2-a]imidazole were obtained in the reaction of -bromopropiophenone with benzaldehyde guanylhydrazone. The 2-amino-1-benzylideneamino-4-arylimidazoles were converted by successive reactions to 1,2-diatnino-4-arylimidazoles and then to imidazo1,2-b]-1,2,4-triazine derivatives —dyes for liquid crystals with positive dichroism.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 236–241, February, 1982. |
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