Selective removal of chlorine from chlorophthalic compounds

Details Selective removal of chlorine from chlorophthalic compounds Selective removal of chlorine from chlorophthalic compounds

1989-11-20

1991-01-01

Lone, Werren B.

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

Organic compounds

Carboxylic acids and salts thereof

502324, 502325, 502340, 502343, 502345, 502355, 560 83, C07C 51083, C07C 51377

Patent

active

049819992

ABSTRACT:
Disclosed is a method of selectively removing chlorine atoms in the order of fifth position first, fourth position second, and third position third from a chlorophthalic compound having at least two ring chlorine atoms such as a chlorophthalic acid or a chlorophthalic anhydride. The chlorophthalic compound is reacted in solution with a hydrodechlorinating metal in the presence of a base.

REFERENCES:
patent: 4302396 (1981-11-01), Tsujimoto et al.
patent: 4684737 (1987-08-01), Horino et al.
Tashiro et al., vol. 42, No. 5, pp. 835-839, (1977), J. Org. Chem.
Deacon et al., Tetrahedron Letters, vol. 25, No. 7, pp. 783-784, (1984).

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