4-(4-Methylphenylsulfonyl)phenylsulfonyl acetic acid → 4-(4-Ethylphenylsulfonyl)phenylsulfonyl acetic acid

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Reaction Steps

The intended 4-(4-ethylphenylsulfonyl)phenylsulfonyl acetic acid was prepared in the same manner as in the synthesis of 4-(4-methylphenylsulfonyl)phenylsulfonyl acetic acid of Example 6 except that 104 g of 4-(4-ethylphenylsulfonyl)phenylthio acetic acid was used in place of 100 g of 4-(4-methylphenylsulfonyl)phenylthio acetic acid. The yield was 97.1 g. NMR (heavy methanol): δ8.3-8.1 (m, 4H), 7.9 (d, 2H), 7.4 (d, 2H), 4.4 (s, 2H), 2.7 (q, 2H), 1.2 (t, 3H).

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