Process for preparing aromatic olefins in the presence of palladium catalysts comprising phosphite ligands

US6291383A · kind A · utility

Assignee

• Aventis Research & Technologies GmbH & Co. · DE

Inventors

• Alexander Zapf · Rosenheim, DE
• Thomas Riermeier · Wemding, DE
• Matthias Beller · Ostseebad Nienhagen, DE

Key dates

• Filing date: Jun 4, 1999
• Grant date: Sep 18, 2001
• Expiry date: Jun 4, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2531/22
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to process for preparing monofunctional, bifunctional or/and polyfunctional olefins of the formulae (Ia), (Ib), (Ic) or/and (Id), ##STR1## where R.sup.1 to R.sup.3 are, independently of one another, hydrogen, (C.sub.1 -C.sub.8)-alkyl, CN, COOH, COO-alkyl-(C.sub.1 -C.sub.8), CO-alkyl-(C.sub.1 -C.sub.8), aryl-(C.sub.6 -C.sub.10), COO-aryl-(C.sub.6-C.sub.10), CO-aryl-(C.sub.6 -C.sub.10), O-alkyl-(C.sub.1 -C.sub.8), O--CO-alkyl-(C.sub.1 -C.sub.8) or N-alkyl.sub.2 -(C.sub.1 -C.sub.8) and aryl is an aromatic radical containing up to 14 carbon atoms, where aryl is as defined above, and Ar is a heteroaromatic, PA1 by reacting haloaromatics, haloolefins or/and heterohaloaromatics of the formulae (IIa), (IIb), (IIc) or/and (IId) with olefins of the formula (III), PA1 wherein a mixture of a palladium(0) complex or a palladium(II) salt with phosphite ligands of the formulae (IVa) or/and (IVb) ##STR2## is used as catalyst.