LDA in tetrahydrofuran (inert atmosphere); addn. of LDA in THF at -78°C to the cyclopropene in THF, warming to -30°C within 2 h, addn. of Me3GeCl in THF,warming to room temp., quenching with H2O; phase sepn., drying (CaCl2), removal of volatiles by distn., gas chromy.;

LDA in tetrahydrofuran (inert atmosphere); addn. of LDA in THF at -78°C to the Ge compd.in THF, stirring 5 h while warming up to -30°C, addn. of Me3GeCl in THF, warming to room temp., quenching with satd. aq. NH4Cl; phase sepn., washing (H2O), drying (CaCl2), concn., gas chromy.;