1: With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h; 2: With boric acid trimethyl ester in tetrahydrofuran; hexane T=-78 - 20°C; 3: With hydrogenchloride in tetrahydrofuran; hexane Further stages.;

n-butyllithium; ammonium chloride in tetrahydrofuran; diethyl ether; hexane; water

1: With magnesium in tetrahydrofuran T=20°C; 2: With boric acid trimethyl ester in tetrahydrofuran T=-65°C; 1 h; Further stages.;

n-butyllithium in tetrahydrofuran; hexane bithiophene and n-BuLi in hexane mixed in THF at 0°C under N2; B(OEt)2 added dropwise at -70°C; temp. raised to room temp.,stirredand aq. H2SO4 added; extn. with dichloromethane was done before aq. NaO H was added; to aq. layer added aq. HCl and compd. extd. with dichloromethane;

1: With n-butyllithium 2: With hydrogenchloride