反应详情

A solution consisting of ethyl 2-(2-naphthyl)acetate (1.07 grams, 5.0 mmol), N-bromosuccinimide (0.89 grams, 5.0 mmol), benzoyl peroxide (0.05 grams), and carbon tetrachloride (50 mL) was heated at reflux until complete as determined by hplc (3 hours). The reaction was cooled to ambient temperature, washed with water (2×25 mL), dried using sodium sulfate, and filtered. The filtrate was concentrated to dryness. The residue was purified using a Biotage Flash 40M system eluting with hexane:ethyl acetate (49:1) to give 1.20 grams (82%) of ethyl 2-bromo-2-(2-naphthyl)acetate, mp 80-82° C. MS (FIA) m/z 293.0 [(M+H)+]. Anal. calcd. for C14H13O2Br: C, 57.36; H, 4.47. Found: C, 57.62; H, 4.54. 1H nmr (CDCl3): δ 1.27-1.33 (t, 3H), 4.18-4.36 (m, 2H), 5.56 (s, 1H), 7.52-7.55 (m, 2H), 7.71-7.76 (m, 1H), 7.82-7.92 (m, 3H), 7.97 (s, 1H).

1. temperaturewas heated
2. temperatureat reflux until complete
3. customas determined by hplc (3 hours)
4. washwashed with water (2×25 mL)
5. customdried
6. filtrationfiltered
7. concentrationThe filtrate was concentrated to dryness
8. customThe residue was purified
9. washeluting with hexane:ethyl acetate (49:1)