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2005
Pyrazole derivatives
R 0180
Design, Synthesis and anti-Microbial Activity of 1H-Pyrazole Carboxylates. —
hydrazones of β-ketoesters, (I), upon treatment with the Vilsmeier
16- 108 Dinitrophenyl
reagent yield pyrazole carboxylate related microbicides (III). Following the same procedure, the formyl pyrazole carboxylate (V) is obtained. The pyrazoles are active
towards both plant pathogenic fungal growth inhibition and bacterial inhibition.
Among the eight compounds tested, (V) significantly inhibits most of the bacterial
growth and exhibits highly significant anti-fungal activity against different fungi. The
first X-ray crystal structure in the family of microbicidal pyrazole-4-carboxylates is
presented, cf. (IIIg). — (SRIDHAR, R.; PERUMAL*, P. T.; ETTI, S.; SHANMUGAM, G.; PONNUSWAMY, M. N.; PRABAVATHY, V. R.; MATHIVANAN, N.;
Bioorg. Med. Chem. Lett. 14 (2004) 24, 6035-6040; Org. Chem. Div., Central
Leather Res. Inst., Adyar, Madras 600 020, India; Eng.) — H. Hoennerscheid
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