zinc in tetrahydrofuran; water under air atm., at room temp., cosolvent media: H2O(NH4Cl)/THF/Zn, alkyliodide was added dropwise to the alkyl tin halide in solvent mixt. over 15 min, reaction time: 3.5 h; Zn was filtered off, aq. phase was extd. three times with n-pentane, organic phase was washed with sat. aq. NaCl and dried over MgSO4, solvent was removed, crude oil was distilled under vac., then chromd. using n-hexane; (119Sn NMR monitoring);

aluminium trichloride in neat (no solvent) 190-200°C, 2.5 Torr;;

in diethyl ether stirred for 1h; treated with 10percent NH4Cl soln., extracted twice with Et2O, chromy. (Fluorisil/hexane); elem. anal.;

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