Process for the preparation of 9,10-dihydro-9-oxa-10-organylphosphaphenanthrene-10-oxide and derivatives of the same substituted on the phenyl groups

US7317120B2 · kind B2 · utility

Assignee

• SCHILL + SEILACHER STRUKTOL GMBH · DE

Inventors

• Uwe Dittrich · Schifferstadt, DE
• Berthold Just · Hamburg, DE
• Manfred Döring · Bad Mergentheim, DE
• Michael Ciesielski · Orchard Park, US

Key dates

• Filing date: Aug 13, 2004
• Grant date: Jan 8, 2008
• Expiry date: Jul 23, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/5313
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is provided for the preparation of 9,10-dihydro-9-oxa-10-organylphosphaphenanthrene-10-oxide and derivatives of same substituted on the phenyl groups, in which: (a) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOP) or a derivative of same is reacted in the presence of at least one mono- or polyhydric alcohol with at least one ortho ester with formation of a first intermediate product, (b) the intermediate product from step (a) is optionally reacted with at least one further mono- or polyhydric alcohol with formation of a further intermediate product and (c) the intermediate product from steps (a) or (b) is transformed by addition of catalytic quantities of alkylation agent into 9,10-dihydro-9-oxa-10-organylphosphaphenanthrene-10-oxide or a derivative of same substituted on the phenyl groups.