US 4,022,817 AGranted

Esters prepared from diacylium complexes of tetrahaloterephthalic acid

AssigneeStandard Oil Company (Indiana)

InventorsJames O. Knobloch, Fausto Ramirez

Life of this patent

Estimating the term…

Abstract

Diacylium complexes of tetrahaloterephthalic acid can be produced by reacting tetrahaloterephthalic acid with sulfur trioxide to form compounds capable of reacting with various nucleophilics.

Claims7

Dependent claims

The method of forming a tetrahaloterephthalic acid ester which comprises reacting a diacylium sulfate complex of a tetrahaloterephthalic acid with a hydroxy compound.

Dependencies are inferred from the claim text.

Facts

Application: 05/613,472Filed 15 Sep 1975 · division
Priority: 10 Jun 1974
Granted: 10 May 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C07C 63/68
Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings: containing halogen
C07C 51/60
Preparation of carboxylic acid halides: by conversion of carboxylic acids or their anhydrides or esters, lactones, salts into halides with the…
C07C 67/00
Preparation of carboxylic acid esters
C07C 67/16
Preparation of carboxylic acid esters: from carboxylic acids, esters or anhydrides wherein one oxygen atom has been replaced by a sulfur, selenium…

Family

Serial477,668Parent of this division · filed 10 Jun 1974
US 3,953,481 AParent of this division
US 4,022,817 AThis patent

From the US filing history. Foreign family members aren’t listed.

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