FIELD: chemistry.
SUBSTANCE: scope of invention covers method of production of compound I where R1 R2, R3 independently from each other mean hydrogen or C1-C6 alkyl, and n is equal to 0, which includes additive reaction of formula II
, where R0, R1, R2, R3 and n are those indicated above and X means the leaving group, with malonic acid dinitrile in inert diluting agent at temperature from 0 to 250°C, in the presence of palladium catalyst and a base characterized in that palladium(II)dihalogenide, palladium(II)dichloride, bis(tricyclohexylphosphine)palladium(II)dichloride, bis(dibenzylideneacetone)palladium(0) or tetrakis(triphenyl phosphine)palladium(0) are used as palladium catalyst.
EFFECT: method allows to increase yield and purity of phenylmalonic acid dinitriles.
13 cl, 6 ex
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Authors
Dates
2008-05-20—Published
2003-12-04—Filed