1: in diethyl ether T=20°C; 2: With water in diethyl ether

1: B-1-hexyldiphenylborane; p-benozquinone in diethyl ether T=20°C; Inert atmosphere; 2: With water in diethyl ether Inert atmosphere; 3: ethanolamine Inert atmosphereCooling with ice; regioselective reaction;