1: With n-butyllithium; tri-isopropoxy-borane in tetrahydrofuran; hexane T=-78 - 20°C; 3 h; 2: With hydrogenchloride in tetrahydrofuran; hexane pH=6;

1: 1-methyl-3-trifluoromethylpyrazol With n-butyllithium in tetrahydrofuran; hexanes; hexane T=-78°C; 1 h; 2: boric acid trimethyl ester in tetrahydrofuran; hexanes T=-78 - 20°C; 3: With hydrogenchloride in tetrahydrofuran; hexanes; water T=20°C; 1.5 h;

1: With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h; 2: With 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane in tetrahydrofuran; hexane T=-75 - 20°C;