Pyrolysis of 2-sulfochloride benzoates

Details Pyrolysis of 2-sulfochloride benzoates Pyrolysis of 2-sulfochloride benzoates

1975-10-07

1977-08-16

Jaisle, Cecilia M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260301, 260470, 260471R, 260544N, 260650R, 260652R, C07D32704, C07C 1902, C07C 2514

Patent

active

040426009

ABSTRACT:
Ortho-sulfobenzoic anhydride is synthesized by pyrolysis of the 2-sulfochloride benzoates. The benzoate intermediates are readily prepared by reacting either the esters of dithiodibenzoic acid with chloride water or the 2-diazonium chloride benzoates with sulfur dioxide. The invention also provides for the total synthesis of saccharin, free of bitter tasting contaminants, from such reactants, the ultimate step in such synthesis being the ammonolysis of the o-sulfobenzoic anhydride.

REFERENCES:
swann, et al., Science & Industrial Reports, Office of the Publication Board, vol. 1, No. 4, (Feb. 1, 1946), Dept. of Comm. (p. 4).

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