Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1984-10-03
1986-06-10
Trousof, Natalie
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
502155, 502162, 528272, 556 7, 556 14, 556 29, C07C 67343
Patent
active
045944474
ABSTRACT:
The invention relates to a process for the dimerization of derivatives of acrylic acid in the homogeneous phase which process is characterized in that a compound having the general formula H.sub.2 C.dbd.CR.sup.1 -COOR.sup.2, wherein R.sup.1 represents H or a linear alkyl group having from 1 to 3 carbon atoms and R.sup.2 represents a linear alkyl group having from 1 to 3 carbon atoms, is reacted in a solvent at a temperature of from -50.degree. C. to +50.degree. C. in the presence of nickel compounds as catalysts which contain complex anions X in a molar ratio Ni:X=1:1 and organic or hydride ligands and are modifed with phosphanes having the general formula PR.sub.2 R', wherein R and R' may be same or different and represent alkyl residues having from 1 to 8 carbon atoms or phenyl residues, as well as the use of the dimers formed in the dimerization.
REFERENCES:
patent: 2232785 (1941-02-01), Howk
patent: 3013066 (1961-12-01), Alderson
patent: 3074999 (1963-01-01), Rauhut et al.
patent: 3417130 (1968-12-01), Pruett et al.
patent: 4451665 (1984-05-01), Nugent
Sperling Karin
Stehling Ludwig
Wilke Gunther
Clarke Vera C.
Studiengesellschaft Kohle MBH
Trousof Natalie
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