copper(l) chloride; lithium tert-butylate in tetrahydrofuran T=40°C; 5 h;

in diethyl ether

Mg in tetrahydrofuran

in tetrahydrofuran reaction at 0°C, 36 hours;;

iodine in tetrahydrofuran; hexane

iodine in tetrahydrofuran; hexane

in dichloromethane under N2; soln. of C6F5Cu in CH2Cl2 added dropwise over 20 min to soln. of BCl3 (3 equiv) in CH2Cl2 at -78 °C; mixt. stirred at -78 °C for 1 h and then allowed to slowly warm to room temp. and stirred for 3 h; after filtration all volatiles slowly removed under high vac. first at -25 °C and subsequently over 3 h at 0 °C; crude product distd. under dynamic vac. at ca. 40 °C into cold trap (liq. N2); vac. transfer into storage flask;

in dichloromethane under N2; soln. of C6F5Cu in CH2Cl2 added dropwise over 20 min to soln. of BCl3 (3 equiv) in CH2Cl2 at -78 °C; mixt. stirred at -78 °C for 1 h and then allowed to slowly warm to room temp. and stirred for 3 h; after filtration all volatiles slowly removed under high vac. first at -25 °C and subsequently over 3 h at 0 °C; crude product distd. under dynamic vac. at ca. 40 °C into cold trap (liq. N2); vac. transfer into storage flask;

in dichloromethane under N2; soln. of C6F5Cu in CH2Cl2 added dropwise over 20 min to soln. of BBr3 (3 equiv) in CH2Cl2 at -78 °C; mixt. stirred at -78 °C for 1 h and then slowly warmed to room temp. and stirred for 3 h; mixt. filtered; volatiles slowly removed at -20 °C under high vac.; crude product distd. under dynamic vac. (DV) at ca. 50°C into cold trap (liq. N2), transferred under static vac. into storage flask and kept under DV at 0°C for 6 h;

in tetrahydrofuran