2,4-Dichloroaniline → 3-[3-(2,4-Dichloro-phenyl)-ureido]-benzoic acid

Beteiligte Stoffe

Reaktionsschritte

To a solution of 200 mg 3-Isocyanato-benzoic acid methyl ester in 2 ml ethyl acetate is added dropwise a solution of 162 mg 2,4-dichloroaniline in 1 ml ethyl acetate. After 5 h at RT the solvent was removed under reduced pressure and the residue dissolved in 5 ml MeOH/THF/H2O 2:2:1. 100 mg lithium hydroxide monohydrate was added and the mixture stirred over night at RT. After removal of the solvent the residue was acidified by addition of 5 ml half concentrated HCl. The precipitating acid was filtered off and dried.

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