in toluene a mixt. in toluene was stirred at 70°C for 15 h (N2); evapd. under reduced pressure, acetonitrile was added, extd. with petroleum ether, acetonitrile was evapd.;

<b>With</b>&nbsp; Mg&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102391', constants.ctx, '0')">tetrahydrofuran</a> <br />&nbsp;the mixt. of dibromide and Mg in THF was refluxed for 30 min, cooled to room temp., the soln. of (C6H11)3SnCl in THF was added, refluxed for 1 h(N2); hydrolyzed with a satd. soln. of NH4Cl, extd. with petroleum ether, dried with MgSO4, evapd., recrystd. from petroleum ether; elem. anal.;&nbsp;<br /> &nbsp;