In a reflux set-up, water, methanol and the previously synthesized imine (5) are introduced. Sodium borohydride is added gradually at a temperature below 5 • C because the reaction is very exothermic but also to optimise the yield. This has led to the formation of white, beads look-alike suspension. The reaction mixture is stirred at room temperature for 20 min with TLC monitoring. The methanol was evaporated and the product extracted with dichloromethane. Excess sodium borohydride NaBH 4 is removed by washing with water. The product was extracted once more with dichloromethane to recover as much product as possible and then washed with briny water, a saturated chloride NaCl solution to remove the remaining traces of water dissoved in the organic layer. The product is dried and the yield was 62%. As mentioned in the experimental procedure, the 1 H NMR analysis allowed us to confirm the obtaining of the desired molecule (4). However, some peak signals (2.01 -1.82 (m, 6H)) are not in good concordance with Litt. (one extra proton)