T=-78°C; 1 h;

diethyl ether anschliessend Behandeln mit H2O;

oxygen 1.) 2-MeTHF, -125 deg C; 2.) -125 deg C; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

1: in diethyl ether T=-78°C; 4 h; 2: With anhydrous sodium pyrophosphate in pentane T=0 - 4°C;

in tetrahydrofuran; diethyl ether under N2, addn. of a soln. of 2-lithiobenzothiazole in Et2O to soln. of triphenylstannylmethyliodide in THF, stirring at -78 ° C for 1 h, warming up to room temp.; evapn. resdue redissolved in cyclohexane/ethyl acetate (1:3), washing with water, organic layer dried over MgSO4, solvent removal, crystn. of Ph3Sn2Ph3 from petroleum ether;

oxygen 1.) 2-MeTHF, -125 deg C; 2.) -125 deg C; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

oxygen 1.) 2-MeTHF, -125 deg C; 2.) -125 deg C; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;