1.) THF, toluene, 80 deg C, 6 h, 2.) 1,4-dioxane, 80 deg C, 36 h; Yield given. Multistep reaction;

in diethyl ether; toluene Mg(C5Me5)2 in toluene was added to BeCl2(OEt2)2 in Et2O, the mixt. was refluxed for 12 h then cooled to room temp.;; evapd., extd. with pentane, filtered, concd., cooled to -10°C; sublimation; elem. anal.;;