Dimethyl-decadial, its preparing method and its use

The present invention provides a process for producing a dimethyldecanedioic acid represented by the general formula (II) HOOC-CH2-CH(CH3)-CH2-CH2-CH2-CH(A)-CH(B)-CH2-COOH wherein either of A and B represents a methyl group and the rest represents a hydrogen atom, which comprises oxidizing a dimethy...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHIMURA NORIAKIRA, SUZUKI SHIGEAKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention provides a process for producing a dimethyldecanedioic acid represented by the general formula (II) HOOC-CH2-CH(CH3)-CH2-CH2-CH2-CH(A)-CH(B)-CH2-COOH wherein either of A and B represents a methyl group and the rest represents a hydrogen atom, which comprises oxidizing a dimethyldecanedial represented by the general formula (I) OHC-CH2-CH(CH3)-CH2-CH2-CH2-CH(A)-CH(B)-CH2-CHO wherein either of A and B represents a methyl group and the rest represents a hydrogen atom. The present invention provides a dimethyldecanedial represented by the general formula (I). Furthermore, the present invention provides a process for producing a dimethyldecanedial represented by the general formula (I), comprising hydroformylating a diolefin represented by the general formula (III) CH2=C(CH3)-CH2-CH2-CH2-CH(A)-CH(B)=CH2 wherein either of A and B represents a methyl group and the The dimethyldecanedial of the present invention is useful as a raw material of production of the dimethyldecanedioic acid represented by the general formula (II). Furthermore, the polyester diol containing the dimethyldecanedioic acid as a dicarboxylic acid component, shows excellent resistance to hydrolysis and is useful as a raw material for producing high-performance polyurethanes.