Water → 3-(2,3,4-Trimethoxy-6-methylbenzoyl)-2-methylthio-4-trifluoromethylpyridine

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Reaction Steps

Sodium methanethiolate (0.32 g) was added to a dimethylformamide (15 ml) solution of 0.9 g of 3-(2,3,4-trimethoxy-6-methylbenzoyl)-2-chloro-4-trifluoromethylpyridine (compound No. 11) at room temperature, followed by stirring for 1 hour. The mixture was poured into water (50 ml), and extraction with ethyl acetate was carried out. The ethyl acetate phase was dried over sodium sulfate, the solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography (hexane-ethyl acetate) to obtain 0.54 g (yield 58%) of 3-(2,3,4-trimethoxy-6-methylbenzoyl)-2-methylthio-4-trifluoromethylpyridine (compound No. 50; pale yellow oily substance), and its structure was confirmed by nuclear magnetic resonance spectrum.

Provenance & Evidence