(4-Chloro-5-methyl-3-trifluoromethyl-pyrazol-1-yl)-acetic acid → Ethyl 2-(1-{[4-chloro-5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl}piperidin-4-yl)-1,3-thiazole-4-carboxylate

Participants

Reaction Steps

4-[4-(Ethoxycarbonyl)-1,3-thiazol-2-yl]piperidinium chloride (VI-1, 5.50 g) is reacted analogously to Example IV-1 with [4-chloro-5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetic acid (4.82 g). This gives, after chromatographic purification, ethyl 2-(1-{[4-chloro-5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl}piperidin-4-yl)-1,3-thiazole-4-carboxylate (6.00 g, 65%).

Provenance & Evidence