1: methyllithium With cerium(III) chloride in tetrahydrofuran; diethyl ether T=-78°C; 0.583333 h; Inert atmosphere; 2: C18H27ClO2 in tetrahydrofuran; diethyl ether T=-78 - 0°C; 1.78333 h; Inert atmosphere; 3: With hydrogenchloride in tetrahydrofuran; diethyl ether; water T=0 - 23°C; Inert atmosphere;