in acetone refluxing for 22 h;;

in tetrahydrofuran at 35-40°C;;

zinc(II) iodide in not given

Zn; CuSO4; acetic acid in tetrahydrofuran CH2I2 is added under N2 to Zn-Cu couple (prepd. from Zn and CuSO4, in acetaic acid heating on steam bath for 2 min) in THF, stirring for 4 h, cooling to 0°C, filtn. (N2, glass wool), then Sn(CH3)3Cl is added, stirring overnight.; Adding aq. HCl and benzene, collecting the organic layer, washing with HCl and drying over Na2SO4, evapn., distn.;

iodine in chlorobenzene (N2); monitored by (1)H NMR;

n-butyllithium; boron trifluoride; potassium carbonate 1) CH3CN, 2) THF, -78 deg C to RT; Yield given. Multistep reaction. Yields of byproduct given;

(C2H5)4NCN in acetonitrile Electrolysis; electrolysis of a mixt. of Me3SnCH2I and Et4NCN in CH3CN;;

AgBr in acetonitrile 7 days at 25°C;;

DIBAL -80 deg C, 3h; -30 deg C, 10h; -30 deg C up to rt., 1h;

in diethyl ether (N2); stirring for 4.5 h;; elem. anal.;;