Ab. Denisova et al., Regioselectivity of the synthesis of 2-pyrazolinylthiazoles by reacting 2-hydrazinothiazoles with unsymmetrical beta-diketones, J CHEM R-S, (1), 2001, pp. 12-13
Novel 2-pyrazolinylthiazoles 1 are prepared by reaction of 2-hydrazinothiaz
oles 2 with 1,3-dicarbonyl compounds of type 3. The conditions of the aroma
tization of 1 to 2-(3-aryl-5-trifluoromethylpyrazol-l-yl) 4 have been inves
tigated.