反应条件
1: 76 percent / NaOH / tetrahydrofuran; H2O / 48 h / Heating
2: 83 percent / SnCl4, HNO3 / CH2Cl2 / 0.08 h / -25 °C
3: 1.) oxalyl chloride, DMF 2.) Et3N / 1. THF, r. t., 3h 2. THF, H2O, r. t., 1.5h
4: 75 percent / SnCl2*H2O / methanol / 0.67 h / Heating
5: 68 percent / HgCl2, CaCO3 / acetonitrile; H2O / 24 h / Ambient temperature
6: 89 percent / 1,4-cyclohexadiene / Pd-C / ethanol / 3 h / 20 °C
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