反应条件
1: 87 percent / NaOMe / methanol / 40 h / Heating 2: 70 percent / urea hydrogen peroxide, DBU, immobilised poly-L-leucine / tetrahydrofuran / 28 h 3: 84 percent / MCPBA, KF / CH2Cl2 / 24 h 4: 90 percent / toluene / 17 h / Heating 5: 94 percent / xylene / 216 h / Heating 6: K2CO3 / ethyl acetate 7: pyridine, DMAP View Scheme