反应详情

A solution of thiophenol (0.23 mL, 2.2 mmol), triethyl amine (0.156 mL, 1.1 mmol), and 6-but-3-ynyl-3-chloro-6-cyclopentyl-dihydro-pyran-2,4-dione (0.30 g, 1.1 mmol; prepared as described in step 1 above) in DMF (3 mL) was stirred at room temperature for 2 hours. The reaction was then concentrated by rotary evaporation, and then chromatographed (40 g silica gel, gradient elution from 40% EtOAc/Hexanes to 75% EtOAc/Hexanes) to yield the title compound (135 mg, 36%). 1H NMR (CDCl3): δ1.31-1.80 (m, 9H); δ1.96-2.00 (m, 2 H); δ2.03-2.11 (3H, m); δ2.85 (2H, dd, J1=17.94, J2=27.03); δ7.13-7.36 (5H, m). Anal. Calcd. for C20H22O3S.0.1 MeOH.0.15 CH2Cl2: C, 67.86; H, 6.38; S, 8.95. Found C, 68.08; H, 6.48; S, 8.52. ESIMS (M+Na+): 365.

1. concentrationThe reaction was then concentrated by rotary evaporation
2. customchromatographed
3. wash(40 g silica gel, gradient elution from 40% EtOAc/Hexanes to 75% EtOAc/Hexanes)