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Ring opening of [1,2,3]triazolo[1,5-a]pyrazinium salts: Synthesis and some transformations of a novel type of 2-aza-1,3-butadienes

✍ Scribed by Mariann Béres; György Hajós; Zsuzsanna Riedl; Géza Timári; András Messmer; Sándor Holly; Joachim G. Schantl


Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
381 KB
Volume
53
Category
Article
ISSN
0040-4020

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With sodium borohydride in tetrahydrofuran/ethanol (5 : 1). the product ( I ) gives a 75 yield of a compound, m.p. 233 "C, that is identical with the recently prepared 2-(diphenylmethyl)imidaz0le[~1. When product ( I ) is boiled for 2 h in tetrahydrofuran/water (2: I ) it affords 2-(hydroxy-dipheny