C(Cl)(Cl)Cl.[NH2:5][C:6]([CH3:13])([CH3:12])[CH2:7][NH:8][CH2:9][CH2:10][OH:11].[OH-:14].[Na+]>CC(C)=O.O>[OH:11][CH2:10][CH2:9][N:8]1[CH2:7][C:6]([CH3:13])([CH3:12])[NH:5][C:6]([CH3:13])([CH3:12])[C:7]1=[O:14]244.2 g (2.05 mol) of chloroform are added to 180 g (1.36 mol) of 2-(2-amino-2-methylpropylamino)ethanol in 1204 ml of acetone. The mixture is cooled to 5° C. under stirring and a solution of 327 g (8.18 mol) of sodium hydroxide in 327 ml of water is slowly added, the temperature of the mixture being maintained at 0°-5° C. during the addition. The mixture is then stirred at this temperature for further 2 hours and at room temperature for 15 hours. Subsequently, the pH of the aqueous solution is corrected to 11 and the mixture is stirred for further 4 hours. Then, the mixture is filtered and the residue is washed with acetone. The filtrate and the acetone of washing are collected and evaporated under vacuum (70° C./24 mbar). The residue is distilled giving a white oil with a boiling point of 115° C. at 2.66 mbar. After cooling a solid product with a melting point of 91°-93° C. is obtained.
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