Thio(cyclo) alkanepolycarboxylic acids containing heterocyclic s

Details Thio(cyclo) alkanepolycarboxylic acids containing heterocyclic s Thio(cyclo) alkanepolycarboxylic acids containing heterocyclic s

1992-11-12

1994-09-13

Morris, Patricia L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D27774

Patent

active

053470087

ABSTRACT:
Compounds of the formula ##STR1## in which X is --S--, --O-- or --NH--, R is H or a monovalent substituent, n is 0 or 1 and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are H, alkyl, alkyl which is substituted by OH, halogen, COOH or alkoxy, unsubstituted or substituted aryl or aralkyl, or carboxyl, or R.sup.1 and R.sup.2 or R.sup.1 and R.sup.3 together are alkylene or R.sup.1 and R.sup.2 are a direct bond, at least two of the groups R.sup.1, R.sup.2, R.sup.3 and R.sup.4 being carboxyl or carboxyalkyl groups, and base addition salts thereof are effective corrosion inhibitors. The preparation of these novel polycarboxylic acids can be effected by various processes.

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