Novel routes to N-amino-1H-pyrrolo [2, 3-b] pyridines from α-hydroxyarylalkyl ketones and hydrazines

YB Chudinov, SB Gashev, SI Firgang…

Index: Chudinov; Gashev; Firgang; Semenov Russian Chemical Bulletin, 2007 , vol. 56, # 8 p. 1612 - 1616

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Abstract

Abstract Treatment of 3-hydroxy-3-(3-pyridyl) butan-2-one hydrazone with polyphosphoric acid gave 1-amino-2, 3-dimethyl-1 H-pyrrolo [2, 3-b] pyridine. An analogous reaction with 2, 4-dinitrophenylhydrazone of the same ketone yielded 1-(2, 4-dinitrophenyl)-3-methyl-4-(3- pyridyl) pyrazole.