in tetrahydrofuran

in tetrahydrofuran refluxing, 27 h;;

Mg in tetrahydrofuran; n-heptane addn. dropwise of THF soln. of vinyl bromine to suspn. of Mg in THF at 253 K; heated mixt. under reflux for 1 h then cooled to 293 K; addn. soln. obtained dropwise stirring to soln. of Ph3SnCl of heptane boiling; stirring for 4 h; cooling to 293 K;; treating with mixt. of ice and NH4Cl(s); extn. with ether after sepn.; drying over CaCl2; evapn.; treating of remaining soln. with aq. KF; washing of organic layer with water; drying; evapn. of solv. under vac.; recrystn. from methanol; elem. anal.;;

for 7 h at 250°C;

in diethyl ether at 25°C;

bromobenzene in further solvent(s) byproducts: tetraphenylbenzene; refluxing in bromobenzene;;

reflux for 102 h;

lithium; tert-butyl alcohol in tetrahydrofuran at -75°C;;

in dichloromethane The mixt. of reagents in CH2Cl2 was stirred overnight;; evapd.;;

bromobenzene in further solvent(s) byproducts: tetraphenylbenzene; refluxing in bromobenzene;;