[CH3:1][S:2]([C:5]([CH3:11])([CH3:10])[CH2:6][C:7]([OH:9])=[O:8])(=[O:4])=[O:3].I[CH2:13]C>>[CH2:1]([S:2]([C:5]([CH3:11])([CH3:10])[CH2:6][C:7]([OH:9])=[O:8])(=[O:3])=[O:4])[CH3:13]The starting material 3-(ethanesulfonyl)-3-methylbutyric acid was prepared in a manner analogous to that described for the preparation of 3-(methanesulfonyl)-3-methylbutyric acid, the starting material usedfor Example 95, using iodoethane in place of iodomethane.
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