[OH-].[Na+].Cl.[N:4]1([C:9]([CH:11]2[CH2:16][S:15][CH2:14][CH2:13][NH:12]2)=[O:10])[CH2:8][CH2:7][CH2:6][CH2:5]1>C(Cl)Cl>[N:4]1([C:9]([CH:11]2[CH2:16][S:15][CH2:14][CH2:13][NH:12]2)=[O:10])[CH2:5][CH2:6][CH2:7][CH2:8]1A 1N aqueous sodium hydroxide solution (12.5 ml) was added to a mixture of 2.47 g of 3-(pyrrolidine1-carbonyl)thiomorpholine monohydrochloride and 20 ml of methylene chloride. The organic layer was extracted and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure to yield 1.75 g (83%) of 3-(pyrrolidine-1-carbonyl)thiomorpholine
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