1: LiAlH4 / diethyl ether 2: SOCl2 3: (i) Mg, I2, Et2O, (ii) /BRN= 1900390/ View Scheme

1: LiAlH4 / diethyl ether 2: SOCl2 3: (i) Mg, I2, Et2O, (ii) /BRN= 1900390/ 4: polyphosphoric acid View Scheme

1: LiAlH4 / diethyl ether 2: SOCl2 3: (i) Mg, I2, Et2O, (ii) /BRN= 1900390/ 4: polyphosphoric acid 5: (i) Br2, CCl4, (ii) γ-collidine 6: H2SO4 7: KOH / methanol 8: (i) aq. NaOH, tetraethyl diphosphate, (ii) Na, NH3, THF, (iii) EtOH View Scheme

Multi-step reaction with 2 steps 2: aqueous KOH; 2-methoxy-ethanol