反应详情

温度

7.5 °C

BF3Et2O (0.3 ml, 2.4 mmol) was added to a solution of alcohol 29 (0.42 g, 2 mmol) and TMSN3 (0.31 ml, 2.4 mmol) in benzene (4.5 ml) during 3 min, while cooling with an ice bath. The reaction mixture was stirred at 5-10° C. for 1 h and filtered through a short silica gel column. The solution was evaporated and the residue was purified by flash chromatography on silica gel (light petroleum ether) to give 30 (0.30 g, 64%) as a colorless oil. 1H-NMR (CDCl3, TMS): 0.92 and 0.98 (total 12H, both s, c-Hex-3,5-CH3); 1.27 (2H, s, c-Hex-4-CH2); 1.40 (6H, s, —C(CH3)2N3); 1.85 and 2.23 (both 2H, both s, c-Hex-2,6-CH2) and 5.27 ppm (1H, s, ═CH—).

1. temperaturewhile cooling with an ice bath
2. filtrationfiltered through a short silica gel column
3. customThe solution was evaporated
4. customthe residue was purified by flash chromatography on silica gel (light petroleum ether)