84385-61-5

Upstream product

• 6969-33-1 1,1-bis-(3,4-dimethyl-phenyl)-1-deoxy-D-glucitol 
• 74-85-1 ethene 
• 21900-23-2 3,4-dimethylbenzoyl chloride 
• 98-11-3 benzenesulfonic acid 

Relevant academic research and scientific papers

SYNTHESIS OF STYRENE AND STILBENE DERIVATIVES BY THE PALLADIUM-CATALYSED ARYLATION OF ETHYLENE WITH AROYL CHLORIDES

The arylation of ethylene with aroyl chlorides, catalysed by palladium(II) acetate, leads to styrene and stilbene derivatives.By appropriate choice of reaction conditions, particularly the ethylene pressure, the reaction can be made to produce either styrene or stilbene derivatives selectively.The reaction tolerates those common substituents which do not react with aroyl chlorides.Only trans-stilbene derivatives are formed.

Process for the preparation of styrene derivatives and/or stilbene derivatives

Compounds of the formulae in which Z represents unsubstituted or substituted phenyl or naphthyl, Z1 represents hydrogen or has the same meaning as Z and Z2 represents unsubstituted or substituted phenylene, naphthylene or p-biphenylene or an unsubstituted or substituted stilbene radical, can be obtained in a simple and economical manner in accordance with a novel process by reacting ethylene, under a pressure of 0.1 to 20 bar, in the presence of a base and with the addition of specific palladium catalysts, such as palladium acetate, with appropriate acid halides. The compounds of the formulae Ia and Ib are valuable intermediates, in particular for the preparation of fluorescent brighteners or scintillators.