反应详情

To a solution of OBS02001 (6.0 g, 19.47 mmol) in anhydrous THF (50 mL) was added sodium borohydride (0.81 g, 21.42 mmol). The mixture was stirred at room temperature for 4 h, quenched with water (CARE!!) and filtered through a Celite pad. The filtrate was concentrated in vacuo and re-dissolved in DCM (200 mL). The organic layer was washed with brine (2×200 mL), dried (Na2SO4) and filtered. Concentration in vacuo of the filtrates gave OBS02002 as a pale yellow oil (5.54 g, 92%). TLC [SiO2, EtOAc-n-hexane (1:1)] Rf=0.47; 1H-NMR (270 MHz, CDCl3)=2.97 (6H, s), 3.14 (1H, bs, OH), 4.51 (2H, s), 7.19 (1H, dd, J=1.5, 8.1), 7.37 (1H, d, J=8.4), 7.52 (1H, d, J=1.8). 3-Bromo-4-(N,N-dimethylsulfamoyl)benzyl chloride (OBS02003)

1. customquenched with water (CARE!!)
2. filtrationfiltered through a Celite pad
3. concentrationThe filtrate was concentrated in vacuo
4. dissolutionre-dissolved in DCM (200 mL)
5. washThe organic layer was washed with brine (2×200 mL)
6. dry with materialdried (Na2SO4)
7. filtrationfiltered
8. concentrationConcentration in vacuo of the filtrates