US 4,400,524 AGranted

Grignard reagents prepared from 5-halopentan-2-one propylene ketals

AssigneeThe Upjohn Company

InventorJoel E. Huber

Life of this patent

Estimating the term…

Abstract

A process for preparing 19-norandrostenedione. Also provides key intermediates of 19-norandrostenedione and methods for preparing them in high yields.

Claims3

Dependent claims

A compound selected from the group consisting of

wherein X is selected from the group consisting of bromine and chlorine.

Dependencies are inferred from the claim text.

Facts

Application: 06/302,004Filed 15 Sep 1981 · continuation in part
Priority: 12 Feb 1979
Granted: 23 Aug 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

C07J 1/0059
Estrane derivatives: substituted in position 17 by a keto group
C07C 45/673
By isomerisation; by change of size of the carbon skeleton: by change of size of the carbon skeleton
C07C 49/16
Saturated compounds containing keto groups bound to acyclic carbon atoms: containing halogen
C07C 53/128
Acids containing more than four carbon atoms: the carboxylic group being bound to a carbon atom bound to at least two other carbon atoms, e.g.…

Family

Serial11,282Parent of this division · filed 12 Feb 1979
Serial96,646Parent of this continuation · filed 23 Nov 1979
Serial287,955Parent of this continuation-in-part · filed 28 Jul 1981
US 4,400,524 AThis patent

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

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