Thio(cyclo)alkanepolycarboxylic acids containing...

Details Thio(cyclo)alkanepolycarboxylic acids containing... Thio(cyclo)alkanepolycarboxylic acids containing...

C - Chemistry, Metallurgy

07

D

260/309, 31/49,

C07D 235/28 (2006.01) C07D 263/58 (2006.01) C07D 277/74 (2006.01) C23F 11/16 (2006.01)

Patent

CA 1225404

Abstract Thio(cyclo)alkanepolycarboxylic acids containing hetero- cyclic substituents Compounds of the formula I Image I in which X is -S-, -O- or -NH-, R is H or a monovalent sub- stituent, n is 0 or 1 and R1, R2, R3 and R4 are H, alkyl, alkyl which is substituted by OH, halogen, COOH or alkoxy, unsubstituted or substituted aryl or aralkyl, or carboxyl, or R1 and R2 or R1 and R3 together are alkylene or R1 and R2 are a direct bond, at least two of the groups R1, R2, R3 and R4 being carboxyl or carboxyalkyl groups, and base addition salts thereof are effective corrosion inhibitors. The pre- paration of these novel polycarboxylic acids can be effected by various processes.

454094

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