potassium hydroxide in dimethyl sulfoxide

boron trifluoride diethyl etherate

in benzene

1: With scandium tris(trifluoromethanesulfonate) in hexane; dichloromethane T=23°C; 24 h; Inert atmosphere; 2: With hydrogenchloride; water in hexane; dichloromethane T=23°C; 0.5 h; Inert atmosphere; regioselective reaction;