Water → Ethyl [7-acetyl-2-methyl-4-(p-tolyl)-5,6,7,8-tetrahydro-9-thia-1,7-diaza-fluoren-3-yl]pentanoate

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Reaction Conditions

Reaction Steps

To a solution of (6-acetyl-2-amino-4,5,6,7-tetrahydrothieno[2,3-c]pyridin-3-yl)(p-tolyl)methanone (2 g; 6.36 mmol) and ethyl 4-oxo-2-propylpentanoate (1.3 g; 7 mmol) in dry DMF (25 mL) under nitrogen atmosphere was added chlorotrimethylsilane (3.25 mL; 25.45 mmol). The mixture was stirred in a sealed tube and heated at 100° C. for 48 h. After cooling, water (25 mL) was added and the resulting mixture was extracted with ethyl acetate. The organic layer was dried over sodium sulfate and concentrated under reduced pressure. Purification by flash-chromatography on silica gel using a gradient of methanol (0-20%) in dichloromethane furnished 2.79 g (94%) of the title compound.

Provenance & Evidence