potassium acetate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride in 1,4-dioxane T=85°C; 18 h; Inert atmosphere;

{(.eta.6-Me6C6)RhCp} in cyclohexane T=150°C; 57 h; Title compound not separated from byproducts;

catalyst: (Ir(OMe)(COD))2/4,4'-(tBu)2-2,2'-bipy in tetrahydrofuran byproducts: H2; 0.2 equiv. of borane reacted with PhBPin in THF at 25°C with (Ir(OMe)(COD))2/4,4'-di-tert-butyl-2,2'-bipyridine (1:2) catalyst system (Ir3 molpercent) for 9 h;

Cp*Rh(η4-C6Me6) in cyclohexane T=150°C; 61 h; Title compound not separated from byproducts.;

(CF3SO2)2NLi in tetrahydrofuran Electrolysis; electrolysis (4 F/mol) with Mg anode under inert atm. at room temp. at 0.15 A/dm**2; after electrolysis, solvent evapd. under vac.; slowly hydrolysed at 0°C with soln. of H2SO4 until pH 5; purified by column chromy. on silica gel (pentane/ether);

(CF3SO2)2NLi in tetrahydrofuran Electrolysis; electrolysis (2 F/mol) with Mg anode under inert atm. at room temp. at 0.15 A/dm**2; after electrolysis, solvent evapd. under vac.; slowly hydrolysed at 0°C with soln. of H2SO4 until pH 5; purified by column chromy. on silica gel (pentane/ether);

(CF3SO2)2NLi in tetrahydrofuran Electrolysis; electrolysis (2 F/mol) with Mg anode under inert atm. at room temp. at 30 mA; after electrolysis, solvent evapd. under vac.; slowly hydrolysed at 0°C with soln. of H2SO4 until pH 5; further products: C6H3(B(OC(CH3)2C(CH3)2O))2Br; purified by column chromy. on silica gel (pentane/ether);