1: With tri-isopropoxy-borane in tetrahydrofuran; hexane T=-70 - -67.5°C; 1 h; 2: With hydrogenchloride in tetrahydrofuran; hexane; water T=-5°C; pH=~ 2; 1 h;

1: 7-Bromo-benzo[b]thiophene With n-butyllithium in diethyl ether; hexane T=-78°C; 0.166667 h; 2: boric acid trimethyl ester in diethyl ether; hexane T=-78 - -10°C;

1: in tetrahydrofuran; hexane T=-70 - -67.5°C; 1 h; Cooling with acetone-dry ice; 2: With hydrogenchloride; water in tetrahydrofuran; hexane pH=2; 1 h;