合成路线： HC-CH-CH2OH CHCI H3C-CH-CH2Br Mg (CH3)CHCHO CH3 CH3 无水醚 OH H20 CrO3/Py >H3C-CH-CH2-CH-CH(CH3)3- _H;C-CH-CH2-C-CH(CH3)2 CH3 CH3 0