First, previously unknown, cyclic organogermanium peroxides, 1,2,4,5,7,8-hexaoxa-3-germonanes, were synthesized by the reaction of 1,1′-dihydroperoxydi(cyclododecyl)peroxide with (di)alkyl(aryl)dihalogengermanes. The newcompounds have a higher tendency to undergo hydrolysis compared to silicon-containing analogs.
Under microwave irradiation, alkyl- or arylhalogermanes RnGeX4, (R = Et, Bu, Ph; X = Cl, Br) are obtained by redistribution reactions of R4Ge with GeX4. These experimental conditions permit the synthesis of such compounds in good yield in a few minutes at atmospheric pressure. The direct Friedel-Crafts germylation of benzene and toluene by germanium tetrachloride also has been performed, but yields were low.
MAZEROLLES, PIERRE, ORGANOMET. SYNTH. VOL. 3, AMSTERDAM E. A.,(1986) 550-551