tetrafluoroboric acid in dichloromethane; water; toluene T=20°C; 0.0833333 h;

1: With copper(I) bromide dimethylsulfide complex; lithium bromide; phosphorus trichoride in diethyl ether; hexane T=23°C; Cooling with ice; 2: With tetrafluoroboric acid in diethyl ether; hexane; water T=25°C; Cooling with ice;