Process for preparing 6-chlorodibenzo[D,F][1,3,2]dioxaphosphepin

US8841474B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ulrich Berens · Binzen, DE
• Holger Ganz · Ludwigshafen, DE
• Franz Niklaus Windlin · Heidelberg, DE
• Alexander Tishkov · Kashkhatau, RU

Key dates

• Filing date: Dec 31, 2012
• Grant date: Sep 23, 2014
• Expiry date: Dec 31, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/65746
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing 6-chlorodibenzo[d,f][1,3,2]dioxaphosphepin (I)which comprises reacting 2,2′-dihydroxybiphenyl with PCl3 in the presence of a catalytic amount of an acid salt of a nitrogen base, wherein the reaction is carried out in the absence of external organic solvents.