2,5-dichlorophenylthioglycolic acid derivative and method for it

Details 2,5-dichlorophenylthioglycolic acid derivative and method for it 2,5-dichlorophenylthioglycolic acid derivative and method for it

1992-01-23

1993-05-11

Chan, Nicky

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

Organic compounds

Sulfonic acids or salts thereof

C07C30929

Patent

active

052102874

ABSTRACT:
The present invention is directed to novel 2,5-dichlorophenylthioglycolic acid derivative, a process for their production and a process for producing the desired product 2,5-dichlorophenylthioglycolic acid derived from said novel compounds. 2,5-dichlorophenylthioglycolic acid derivative of the present invention can be obtained by reacting 2,4,5-trichlorobenzensulfonates and thioglycolic acid in the presence of base, and said desired product can be obtained by desulfonating said compound in an aqueous solution of mineral acid. Novel 4-carboxymethylthio-2,5-dichlorobenzenesulfonates of the present invention can be used advantageously as an intermediate for the production of 2,5-dichlorophenylthioglycolic acid. The use of said intermediate makes it possible to obtain the desired product in a decreased process steps with high yield. In addition, it poses no problem of environmental pollution as pointed out with conventional methods because it uses no heavy metals.

REFERENCES:
Chemical Abstracts 68:59210A (1968).
Galat, J. American Chemical Society, 74, pp. 3890-3891 (1951).
Cecchetti et al., J. Medicinal Chemistry, 30, pp. 465-473 (1987).

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