A new series of pyrazole derivatives have been synthesized and characterized by various spectroscopic techniques. Initially, 2-hydrazinyl-4-methylbenzo[d]thiozole (1) and dichlorofluoroacetophenone (2) were refluxed for 24 hours at room temperature to yield (Z)-2-(4-((2-(4-(2-chloroflurophenyl) thiozol- 2-yl)hydrazono)methyl)-3-phenyl-1H-pyrazol- 1-yl)-4-methylbenzo[d]thiazole (3). 1-(4-methyl-1,3- benzothiazol-2-yl)-3-chloro flurophenyl-1H-pyrazole-4-carbaldehyde (4) was synthesized by following the Vilsmeyer-Haack reaction. For this purpose, the compound (3) was treated with DMF and POCl3 by refluxing for five hours at 90 °C. Then the obtained pyrazole aldehyde (4) was treated with sodium borohydride in the presence of methanol by stirring for 24 hours at room temperature to get pyrazole methanol (5). Then the pyrazole methanol was treated with different carboxylic acid substituents in a 1:1 ratio to get the final products (5a-f). All the reactions were monitored using Thin Layer Chromatography (TLC). The compounds were purified by recrystallization to record the spectra. The structures of all the compounds have been determined by using various spectroscopic techniques, such as 1H-NMR spectroscopy, and Mass spectrometry