US 4,054,584 AGranted

Method for making bis(thioether anhydride)s

AssigneeGeneral Electric Company

InventorFrank J. Williams, III

Life of this patent

Estimating the term…

Abstract

A method is provided for making bis(thioetherphthalic anhydride)s from bis(thioetherphthalimide)s. The latter compounds can be made by using an alkali metal sulfide with a nitro N-organo substituted phthalimide.

Claims7

Dependent claims

A method for making bis(thioether phthalic anhydride)s of the formula ##STR5##

which comprises, 1. effecting reaction between an alkali metal sulfide M.sub.2 S, and an N-substituted phthalimide of the formula, ##STR6## to produce an intermediate bis(thioether phthalimide),

Dependencies are inferred from the claim text.

Facts

Application: 05/684,015Filed 7 May 1976 · continuation in part
Priority: 30 Mar 1973
Granted: 18 Oct 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C07D 209/38
Oxygen atoms: in positions 2 and 3, e.g. isatin
C07D 307/89
Benzo [c] furans; Hydrogenated benzo [c] furans: with two oxygen atoms directly attached in positions 1 and 3
C08G 59/423
Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof: containing an atom other than oxygen belonging to a functional…
C07D
Heterocyclic compounds

Family

Serial346,470Parent of this continuation-in-part · filed 30 Mar 1973
US 3,989,712 AParent of this continuation-in-part
US 4,054,584 AThis patent

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

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