triethylamine in benzene 24 h;

sodium hydroxide in ethanol; water 2 h; Heating;

palladium diacetate; 1,2-bis-(diphenylphosphino)ethane in tetrahydrofuran 6 h; Heating;

sodium hydroxide 1.) ether, 24 h; 2.) 0 deg C, 1 h; 3.) 3 h, r.t.; Yield given. Multistep reaction;

(i) Na, (ii) /BRN= 1209223/; Multistep reaction;

(i) nBuLi, THF, hexane, (ii) /BRN= 471223/; Multistep reaction;

1: methylphosphonic acid bis(dimethylamide) With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.5 h; 2: With copper(l) iodide in tetrahydrofuran; hexane T=-40 - -30°C; 1 h; 3: iodobenzene With palladium diacetate; 1,2-bis-(diphenylphosphino)ethane in tetrahydrofuran; hexane 6 h; Heating;