US 5,210,238 A · Perfluorinated cyclic hemiketals, corresponding perfluorodiketones and process for preparing them

Abstract

Perfluorinated cyclic hemiketals of formula: ##STR1## where n=1-6, m=2-3, and their corresponding perfluoridiketones. The latter are prepared by means of perfluoroalkylation reaction of diacyl fluorides with perfluoroalkyl-trialkyl silanes. The perfluorodiketones can be then reacted with H.sub.2 O in order to obtain said cyclic hemiketals.

Claims3

Dependent claims

Perfluorinated cyclic hemiketal of formula:

##STR7## where n is an integer ranging from 1 to 6, m is 2 or 3.

Dependencies are inferred from the claim text.

Facts

Application

07/824,072Filed 23 Jan 1992

Granted

11 May 1993

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C07D 309/10
With hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals,…:…
C07C 45/45
Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds: by condensation
C07C 49/167
Containing halogen: containing only fluorine as halogen
C07D 307/20
With hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals,…:…

Perfluorinated cyclic hemiketals, corresponding perfluorodiketones and process for preparing them

Life of this patent

Abstract

Claims3

Perfluorinated cyclic hemiketals, corresponding perfluorodiketones and process for preparing them

Life of this patent

Abstract

Claims3