phenylmercuric perchlorate in tetrahydrofuran 0.333333 h; Ambient temperature;

1: 76 percent / LDA / tetrahydrofuran / 1.) -78 deg C, 10 min, 2.) room temperature, 4 h 2: 98 percent / 4-(dimethylamino)pyridine, Et3N / CH2Cl2 / 72 h / Ambient temperature 3: 63 percent / LDA / tetrahydrofuran / 0.5 h / -78 °C 4: 68 percent / phenylmercuric perchlorate / tetrahydrofuran / 0.33 h / Ambient temperature View Scheme

1: 98 percent / 4-(dimethylamino)pyridine, Et3N / CH2Cl2 / 72 h / Ambient temperature 2: 63 percent / LDA / tetrahydrofuran / 0.5 h / -78 °C 3: 68 percent / phenylmercuric perchlorate / tetrahydrofuran / 0.33 h / Ambient temperature View Scheme

1: 63 percent / LDA / tetrahydrofuran / 0.5 h / -78 °C 2: 68 percent / phenylmercuric perchlorate / tetrahydrofuran / 0.33 h / Ambient temperature View Scheme