p-Chlorobenzenesulfonic acid → HCID 12303406, compound

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Reaction Steps

p-Chlorobenzenesulfonic anhydride was prepared, as described in the previous example, by reacting 9.4 g (0.12 mole) of sulfur trioxide with 6.0 g (0.054 mole) of chlorobenzene. There was obtained 5.7 g (57.2% yield) of product with mp 140.0°-147.3° C. (lit. 130°-141° C. Christensen, Acta Chem. Scand. 15, 1507 (1961); lit. mp for p-chlorobenzenesulfonic acid =50.5° C., Dictionary of Org. Cpds., Vol. 2, 4th Edition, Oxford Univ. Press, N.Y., p. 601). Anal: Calc'd for C12H8O5S2Cl2 : C, 39.23; H, 2.17; S, 17.34. Found: C, 39.20; H, 2.50; S, 17.61.

Provenance & Evidence