反应详情

3-Chloro-2,4-difluorobenzoyl chloride (1.92 g, 9.1 mmol) was added slowly to a stirred solution of (2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)methylamine (1.89 g, 10.0 mmol) in a 1:1 mixture of 10% sodium hydroxide solution and DCM at 0° C. The reaction mixture was then allowed to warm up to RT and left to stir for 5 hours. The phases were separated and the aqueous phase was extracted with DCM (3×50 mL). The combined extracts were dried (MgSO4), filtered and evaporated to give a pale yellow oil. Purification by column chromatography on silica, eluting with 0-50% ethyl acetate in hexanes, gave the title compound as a colourless oil (2.26 g) 1H NMR δ (CDCl3): 0.00 (s, 6H), 0.82 (s, 9H), 2.93 (s, 3H), 3.58 (t, 2H), 3.81 (t, 2H), 6.95 (dtd, 1H), 7.16-7.22 (m, 1H)

1. waitleft
2. customThe phases were separated
3. extractionthe aqueous phase was extracted with DCM (3×50 mL)
4. dry with materialThe combined extracts were dried (MgSO4)
5. filtrationfiltered
6. customevaporated
7. customto give a pale yellow oil
8. customPurification by column chromatography on silica
9. washeluting with 0-50% ethyl acetate in hexanes