反应详情

温度

0 °C

To a stirred solution of 1,3-dichloro-5-(1-trifluoromethyl-vinyl)-benzene (10 g, 41.49 mmol) in DCM (150 mL) was added benzyl-methoxymethyl-trimethylsilanylmethyl-amine (Preparation 29, 39.33 g, 165.97 mmol) at room temperature. Resulting reaction mixture was cooled to 0° C. and TFA (0.32 mL, 0.41) was added slowly and stirred at room temperature for 5 hours. After complete consumption of starting material, reaction mixture was basified by aqueous Na2CO3 and extracted with DCM (3×100 mL). Combined organic layer was dried over Na2SO4, and concentrated under vacuum to afford brown oil (9.5 g, crude). Crude compound was purified by column chromatography using 100-200 mesh silica gel. Desired product was eluted in 2% ethyl acetate in hexane to afford product as brown solid (7.5 g, 48.29%). 1H-NMR (400 MHz, CDCl3) δ: 2.28-2.35 (m, 1H), 2.53-2.60 (m, 1H), 2.69-2.81 (m, 2H), 3.03-3.11 (m, 2H), 3.66 (s, 2H), 7.26-7.35 (m, 8H).

1. customResulting
2. customreaction mixture
3. customAfter complete consumption of starting material, reaction mixture
4. extractionextracted with DCM (3×100 mL)
5. dry with materialCombined organic layer was dried over Na2SO4
6. concentrationconcentrated under vacuum
7. customto afford brown oil (9.5 g, crude)
8. customCrude compound was purified by column chromatography
9. washDesired product was eluted in 2% ethyl acetate in hexane