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EP0273008A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for the preparation of 2,2-difluoropent-4-ene-carboxylic acids and derivatives

Assignee: Novartis AG
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Filing: 1987-12-14
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Granted: —
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Expires: 2007-12-14
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Abstract

Abstract Translated from German Die Umsetzung von Brom- bzw. Chlordifluoressigsäureallylestern mit Monochlorsilanen in Gegenwart von Zink unter Erwärmen ergibt Silylester von α,α-Difluor-γ,δ-pentensäuren. Durch Hydrolyse erhält man die freien Säuren, aus denen nach üblichen Methoden Säurederivate herstellbar sind. Die Pentensäuren und Pentensäurederivate eignen sich zur Herstellung von Polymeren und Copolymeren, aus denen metallorganische Polymere und Copolymere mit katalytischen Eigenschaften erhältlich sind. The reaction of allyl bromo- or chlorodifluoroacetic acid with monochlorosilanes in the presence of zinc with heating gives silyl esters of α, α-difluoro-γ, δ-pentenoic acids. The free acids, from which acid derivatives can be prepared by customary methods, are obtained by hydrolysis. The pentenoic acids and pentenoic acid derivatives are suitable for the production of polymers and copolymers from which organometallic polymers and copolymers with catalytic properties can be obtained.

Inventors

  • 👤 Robert Werner Dr. Lang

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 10:25
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/09; C07C51/347; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1896

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