Cyclohexanethiol → 2-(Cyclohexylthio)-6-(trifluoromethyl)nicotinonitrile

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反応手順

1.3 equivalents of NaH (4.9 g, 0.124 mol) were dissolved in 50 mL DMF under a nitrogen atmosphere. After the addition of 1.2 equivalents of cyclohexanethiol (14.2 mL, 0.116 mol), stirring was performed at room temperature for 1.5 h. The resultant suspension was cooled to 10° C. and 1 equivalent of 2-chloro-6-(trifluoromethyl)nicotinonitrile (20 g, 0.096 mol) in 50 mL DMF was added dropwise and stirred for 2 h at room temperature. The reaction mixture was quenched with sat. aq. NH4Cl soln., diluted with 1 l of water and extracted repeatedly with EA (3×200 mL). The combined organic phases were washed with a sat. aq. NaCl soln., dried over MgSO4 and evaporated under a vacuum. Purification performed by column chromatography (silica gel, 100-200 mesh, eluent: 2% EA in hexane) resulted in 26 g (93.8%) of product.

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