反应条件
1: With n-butyllithium in tetrahydrofuran; hexanes; diethyl ether T=-100 - -70°C; 1.25 h; 2: With boron triethoxide in tetrahydrofuran; hexanes; diethyl ether T=20°C; 3: With hydrogenchloride; water in tetrahydrofuran; hexanes; diethyl ether T=20°C; 1 h;
