反应条件
1: 65 percent / N-ethyldiisopropylamine / CH2Cl2 / 2 h / 25 °C 2: 93 percent / sec-butyllithium; N,N,N',N'-tetramethylethylenediamine / tetrahydrofuran; cyclohexane / 2 h / -75 °C 3: 94 percent / boron trifluoride-diethyl ether / methanol / 15 h / 25 °C View Scheme
