[CH2:1]([N:8]1[CH2:12][CH:11]([CH2:13][OH:14])[CH:10]([OH:15])[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:16][S:17](Cl)(=[O:19])=[O:18].C(N(CC)CC)C>C(Cl)(Cl)Cl>[CH2:1]([N:8]1[CH2:12][CH:11]([CH2:13][O:14][S:17]([CH3:16])(=[O:19])=[O:18])[CH:10]([OH:15])[CH2:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1The known compound, 1-benzyl-3-hydroxy-4-hydroxymethylpyrrolidine [see J. Org. Chem., 30, 740 (1965)] (110 g) was allowed to react in chloroform with methanesulfonyl chloride (60.9 g) in the presence of triethylamine to yield 1-benzyl-3-hydroxy-4-methanesulfonyloxymethylpyrrolidine (81 g) as an oil.
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