反应详情

To a solution of ethanethiol (538 mL, 7.27 mmol) in 1.88 mL of tetrahydrofuran, cooled to −30° C. was added n-butyllithium (2.57 mL, 2.5 M, 6.42 mmol) and the reaction was warmed to room temperature. Dimethylformamide (1 mL) was added then the product from Step 1 (1.73 g, 4.3 mmol) in 2.7 mL of dimethylformamide. The reaction was heated at 58° C. for two hours then at 80° C. for 1 hour. The cooled reaction was poured into 33 mL oh 1N hydrochloric acid and extracted with ethyl acetate. The combined organic layers was washed with brine and dried over anhydrous magnesium sulfate. After filtration, concentration and silica gel column chromatography using 15% ethyl acetate -hexanes as eluant the title compound (1.17 g) was obtained.

1. temperatureThe reaction was heated at 58° C. for two hours
2. customThe cooled reaction
3. extractionextracted with ethyl acetate
4. washThe combined organic layers was washed with brine
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationAfter filtration, concentration and silica gel column chromatography
7. customwas obtained