反应详情

To a suspension of 1F (103.9 mg, 0.6 mmol) in CH3CN (3 mL) at RT under argon was added DIPEA (0.11 mL, 0.66 mmol), followed by dropwise addition of benzene sulfonylchloride (0.08 mL, 0.63 mmol). The reaction mixture was stirred at RT for 1.5 h, then concentrated under reduced pressure. The residue was taken into EtOAc, washed with water, brine, dried (Na2SO4), and concentrated. The resulting residue was chromatographed (silica gel) eluting with EtOAc (30-50%) in hexane to give the title compound (170 mg, 90%). HPLC: 99% at 5.2 min (retention time) (Conditions: Zorbax SB C18 (4.6×75 mm); Eluted with 0% to 100% B, 8 min gradient. (A=90% H2O−10% MeOH−0.1% H3PO4 and B=10% H2O−90% MeOH−0.1% H3PO4); Flow rate at 2.5 mL/min. UV detection at 220 nm). MS (ES): m/z 314 [M+H]+.

1. concentrationconcentrated under reduced pressure
2. washwashed with water, brine
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated
5. customThe resulting residue was chromatographed (silica gel)
6. washeluting with EtOAc (30-50%) in hexane