Mg; HCl in tetrahydrofuran; diethyl ether; benzene mixing equimolar amts. of naphthalene derivative and Mg (in THF/ether/C6H6), addn. to 0.5 equiv. of Ge-compd. (in THF) at room temp., refluxing for 3 h; addn. of diltd. HCl, fractional distn.;

in cyclohexane Irradiation (UV/VIS); Ar-atmosphere; 110 W low pressure Hg-lamp, room temp., 30 min; gas chromy.;

1: Mg; HCl / tetrahydrofuran; diethyl ether; benzene 2: EtOH / ethanol; cyclohexane View Scheme