US 5,491,244 A · Acrylate ester

Abstract

The present invention concerns a method for the production of olefin anhydrides, such as acrylic anhydride and methacrylic anhydride, via reactions between an aromatic acid chloride, such as benzoyl chloride, and carboxylate ions of the olefin acid corresponding to the anhydride to be produced. The method of the invention may be conducted without the use of a solvent, catalyst, polymerization inhibitor, or an external source of heat. Moreover the acrylic anhydrides of the invention can be used to produce high yields of acrylate esters by means of room-temperature reactions, without mineral acid catalysis.

Claims1

Dependent claims

A chemical compound of the formula:

##STR5##

Dependencies are inferred from the claim text.

Facts

Application

08/476,983Filed 7 Jun 1995 · division

Priority

27 May 1994

Granted

13 Feb 1996

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C07D 303/16
With hydrocarbon radicals, substituted by singly or doubly bound oxygen atoms: by esterified hydroxyl radicals
C07C 51/56
Preparation of carboxylic acid anhydrides: from organic acids, their salts, their esters or their halides, e.g. by carboxylation
C07C 67/08
Preparation of carboxylic acid esters: by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
C07D
Heterocyclic compounds

Abstract

Claims1

Dependent claims

A chemical compound of the formula:

##STR5##

Dependencies are inferred from the claim text.

Acrylate ester

Life of this patent

Abstract

Claims1

Acrylate ester

Life of this patent

Abstract

Claims1