Manufacture of symmetrical carotenoids

US4127455A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Schulz · Schwetzingen, DE
• Hans Grassner · Heidelberg, DE
• Peter Jaeger · Sharjah, AE
• Heinz Nohe

Key dates

• Filing date: Jul 20, 1977
• Grant date: Nov 28, 1978
• Expiry date: Jul 20, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5428
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Symmetrical carotenoids are manufactured from the molecular halves thereof by a process wherein phosphonium salts of the molecular halves of these symmetrical carotenoids are oxidized electrochemically in a solvent and in the presence of a base, causing the molecular halves to dimerize, with elimination of substituted phosphine oxide.