Diethyl sulfoxide → [4-(7-Chloro-1,3-benzodioxol-5-yl)-2-pyrimidin-2-yl-5-(trifluoromethyl)pyrazol-3-yl]imino-diethyl-lambda4-sulfane

Beteiligte Stoffe

Reaktionsschritte

To a solution of diethyl sulfoxide (0.47 g, 4.4 mmo) in dichloromethane at −60° C. under argon was added drop-wise trifluoroacetic anhydride (0.93 g, 4.4 mmol). The solution was stirred for 20 min at this temperature. Then the 4-(7-chloro-1,3-benzodioxol-5-yl)-2-pyrimidin-2-yl-5-(trifluoromethyl)pyrazol-3-amine (0.76 g, 2 mmol) was added and the solution stirred at −60 C for 1 h. The reaction was diluted with aqueous ammonia; the organic layer was separated and further washed with water and then dried and concentrated. The residue was re-crystallized with a mixture of ethyl acetate and petrole ether to give the title compound (270 mg; 29%).

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