Process for preparing 6-oxo-(6H)-dibenz-C,E! 1,2!-oxaphosphorins

US5717127A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Josef Buysch · Krefeld, DE
• Volker Glock · Krefeld, DE

Key dates

• Filing date: Apr 17, 1996
• Grant date: Feb 10, 1998
• Expiry date: Apr 17, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/65719
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

For the continuous preparation of 6-oxo-(6H)-dibenz-c,e!1,2!-oxaphosphorins (ODOPs), 6-chloro-(6H)-dibenz-c,e!1,2!-oxaphosphorins (CDOPs) are continuously reacted with at least the stochiometrically required amount of water at elevated temperature in a reaction section having little backmixing.