[NH2:1][C@H:2]1[CH2:7][CH2:6][C@H:5]([NH2:8])[CH2:4][CH2:3]1.[CH3:9][S:10]([Cl:13])(=[O:12])=[O:11]>C(Cl)Cl>[ClH:13].[NH2:1][CH:2]1[CH2:7][CH2:6][CH:5]([NH:8][S:10]([CH3:9])(=[O:12])=[O:11])[CH2:4][CH2:3]1To trans 1,4-diaminocyclohexane (2.0 g, 17.5 mmol) in DCM at 0° C. (ice bath) was added methanesulfonyl chloride (1.63 mL, 21.0 mmol). The reaction was allowed to stir at RT for 1 h when a precipitate formed and was collected on a glass frit, rinsed with DCM, and dried to afford 2.56 g (64%) of 360.
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