反应详情

The title compound was prepared as described in General Method 9 from 4-hydroxy-6-[2-(4-hydroxy-phenyl)-ethyl]-6-methyl-5,6-dihydro-pyran-2-one (prepared in Example KK; 0.09 g, 0.37 mmol), DMF (6 mL), K2CO3 (0.11 g, 0.81 mmol), and toluene-4-thiosulfonic acid S-[2-tert-butyl-4-(4-cyano-benzenesulfonylamino)-5-methyl-phenyl] ester (prepared in Example JJJJ; 0.19 g, 0.37 mmol). The mixture was stirred at room temperature overnight. After the standard work-up, the resulting residue was flash chromatographed on silica gel, eluting with 2% EtOH:EtOAc, then triturated with EtOAc:CH2Cl2 :hexanes to afford the title compound. 1H NMR (DMSO-d6) δ 1.24 (s, 9 H), 1.42 (s, 3 H), 1.87 (s, 3 H), 1.92 (m, 2 H), 2.52 (m, partially obscured by DMSO, 2 H), 2.75 (d of ABX q, 1 H), 2.95 (d of ABX q, 1 H), 6.46 (s, 1 H), 6.64 (d, 2 H), 6.70 (s, 1 H), 6.96 (d, 2 H), 7.77 (d, 2 H), 8.06 (d, 2 H), 9.15 (s, 1 H), 9.68 (s, 1 H).

1. customThe title compound was prepared
2. customchromatographed on silica gel
3. washeluting with 2% EtOH
4. customEtOAc, then triturated with EtOAc