Method for preparing 2-sulfochloride benzoates and the use of sa

Details Method for preparing 2-sulfochloride benzoates and the use of sa Method for preparing 2-sulfochloride benzoates and the use of sa

1978-04-24

1981-03-31

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

260141, 560 14, 560 18, C07D27506

Patent

active

042594995

ABSTRACT:
A method of preparing 2-sulfochloride benzoates which comprises diazotizing any anthranilate to form a 2-diazonium chloride benzoate and thereafter reacting said 2-diazonium chloride benzoate with sulfur dioxide to form a 2-sulfochloride benzoate. The invention also provides for the total synthesis of saccharin which comprises pyrolyzing a 2-sulfochloride benzoate to form an o-sulfobenzoic anhydride and then ammonolyzing the o-sulfobenzoic anhydride to saccharin which is free of bitter tasting contaminants from such reactants.

REFERENCES:
patent: 2667503 (1954-01-01), Senn
Meerwein et al., Chemische Berichte, vol. 90, No. 6, pp. 841-852, (1957).

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