反应条件
1: With n-butyllithium in ethylene glycol dimethyl ether
T=-40°C; 16 h;
2: With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in ethylene glycol dimethyl ether
T=-78 - 0°C;
3: With ethylene dibromide in ethylene glycol dimethyl ether
T=-78 - 0°C;
