1: AlH3 / diethyl ether 2: (i) (bromination), (ii) /BRN= 3587317/, Et2O 3: (i) nBuLi, THF, (ii) /BRN= 605437/, (iii) /BRN= 506523/, (iv) /BRN= 3587200/, CuI 4: AlH3 View Scheme