[S:1](Cl)([CH3:4])(=[O:3])=[O:2].[CH3:6][N:7]1[CH2:12][CH2:11][N:10]([C:13]2[CH:18]=[CH:17][C:16]([N+:19]([O-:21])=[O:20])=[C:15]([O:22][CH:23]([CH3:25])[CH3:24])[CH:14]=2)[CH2:9][CH:8]1[CH2:26][CH2:27][OH:28]>ClCCl.N1C=CC=CC=1>[CH3:4][S:1]([O:28][CH2:27][CH2:26][CH:8]1[CH2:9][N:10]([C:13]2[CH:18]=[CH:17][C:16]([N+:19]([O-:21])=[O:20])=[C:15]([O:22][CH:23]([CH3:24])[CH3:25])[CH:14]=2)[CH2:11][CH2:12][N:7]1[CH3:6])(=[O:3])=[O:2]42 microliters of mesyl chloride are added to a solution of 160 mg of 2-{1-methyl-4-[4-nitro-3-(propan-2-yloxy)phenyl]piperazin-2-yl}ethanol in 2 ml of dichloromethane and 0.2 ml of pyridine. The reaction medium is stirred at ambient temperature overnight and then concentrated under vacuum, under reduced pressure, so as to give 190 mg of 2-{1-methyl-4-[4-nitro-3-(propan-2-yloxy)phenyl]piperazin-2-yl}ethyl methanesulfonate in the form of an orangey-coloured oil.
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