反应详情

To a solution of t-butylamine (8.35 g, 0.114 mol) in dry tetrahydrofuran (THF) (20 mL) cooled to 0° C. was added dropwise 2-thiophenesulfonyl chloride (5.0 g, 27.4 mmol). After the addition was completed, the reaction mixture was warmed to ambient temperature and stirred overnight. The mixture was extracted with ethyl acetate (3×80 mL) and the combined extracts were washed with water, dried over molecular sieves and concentrated. The residue was chromatographed on silica, eluting with 25% ethyl acetate-hexane, to yield 5.62 g (94%) of solid: mp 80°-82° C.

1. additionAfter the addition
2. extractionThe mixture was extracted with ethyl acetate (3×80 mL)
3. washthe combined extracts were washed with water
4. customdried over molecular sieves
5. concentrationconcentrated
6. customThe residue was chromatographed on silica
7. washeluting with 25% ethyl acetate-hexane