反应条件
1: 78 percent / butyllithium; 2,2,6,6-tetramethylpiperidine / hexane; tetrahydrofuran / -75 °C 2: 52 percent / butyllithium; 2,2,6,6-tetramethylpiperidine; N,N',N',N",N"-(pentamethyl)diethylenetriamine / potassium tert-butoxide / tetrahydrofuran; hexane / 2 h / -100 °C 3: 90 percent / potassium hydroxide / methanol; H2O / 2 h / Heating View Scheme
