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C07C57/00—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms
C07C57/30—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms containing six-membered aromatic rings
C07C57/34—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms containing six-membered aromatic rings containing more than one carboxyl group
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Chemical & Material Sciences
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Organic Chemistry
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Polyesters Or Polycarbonates
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
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Abstract
(HOOC-CHR1-CR2R3)2Ar (in which R1 R2 and R3 are H or CH3, and Ar is a divalent aromatic radical with not more than 2 non-condensed benzene rings) is prepared by reacting the appropriate hydrocarbon Ar with alpha, beta unsaturated alkenyl monocarboxylic acid with the required R1, R2, and R3 in the presence of Sb F5 (preferably SbF5/water, 1:18 to 1:2.4 molar, particularly 2.0-2.2. mols H2O per mol. SbF5). Spec. the hydrocarbon is benzene and the acid 3 methyl-crotonic acid.
NL6912289A1969-08-131969-08-13Aromatic dicarboxylic acids for use in poly- - esters etc
NL6912289A
(en)
Bis-hydroxyalkyl imidazolones - made by condensing benzimidazolones with formaldehyde or epoxyalkanes are useful raw materials for polyesters or polyurethanes