Na; MeOH in acetonitrile simultaneous addn. of solns. of Ni-complex and Na/MeOH to boiling MeCN (over 4 h), refluxing (24 h, pptn.), cooling to room temp.; filtration, volume reduction, repeated chromy. (Al2O3,MeCN), EtOH addn., crystn. (12 h, freezer), washing (EtOH), drying (vac.); elem. anal.;

dilithium tetrachlorocuprate in tetrahydrofuran; diethyl ether T=-30°C; 0.25 h;

sodium methylate Heating;

(i) Li2CuCl4, THF, Et2O, (ii) /BRN= 3500572/; Multistep reaction;