[OH:1][CH:2]([CH3:17])[CH2:3][S:4]([C:7]1[CH:12]=[C:11]([N+:13]([O-:15])=[O:14])[CH:10]=[CH:9][C:8]=1Cl)(=[O:6])=[O:5].[CH2:18]([NH2:21])[CH2:19][NH2:20]>C(O)(C)C.O>[OH:1][CH:2]([CH3:17])[CH2:3][S:4]([C:7]1[CH:12]=[C:11]([N+:13]([O-:15])=[O:14])[CH:10]=[CH:9][C:8]=1[NH:20][CH2:19][CH2:18][NH2:21])(=[O:6])=[O:5]28 g (0.1 mol) of 2-chloro-5-nitrophenyl 2-hydroxypropyl sulphone are refluxed in 100 ml of isopropanol. To this are added gradually 15 ml of ethylenediamine, and heating is continued with stirring for a further hour. The cold reaction solution is diluted with 300 ml of water and stirred at 20° C. for two hours. The precipitated yellowish crystals are filtered off with suction, washed with 100 ml of water and dried. This gives 28 g of uniform 2-(2-aminoethylamino)-5-nitrophenyl 2-hydroxypropyl sulphone.
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