10.
    发明专利
    未知

    公开(公告)号:DE19630082A1

    公开(公告)日:1998-01-29

    申请号:DE19630082

    申请日:1996-07-26

    Applicant: BASF AG

    Abstract: A process is disclosed for preparing 3-pyrroline-2-carboxylic acid derivatives of formula (I), in which R stands for H, C1-C6-alkyl, benzyl, benzyl substituted at the phenyl radical, allyloxycarbonyl, C1-C6-alkyloxycarbonyl, benzyloxycarbonyl, in which the benzyl radical can be substituted by OCH3 radicals, or for C1-C4-alkylcarbonyl; or R stands for an amino acid radical which can be alkylated or acylated at the nitrogen and is linked by the C-terminal; and R stands for OH, C1-C4-alkyloxy, benzyloxy or an N R group, in which R and R represent independently from each other H, C1-C4-alkyl, benzyl, phenyl or pyridyl, in which the aromatic compounds in R and R can be substituted by up to three identical or different substituents selected from the group composed of methyl, methoxy, hydroxy, cyano or halogen. According to this process, the sulphonic acid radical is eliminated by means of a base from a compound having the formula (II), in which R and R have the above meanings and R stands for C1-C6-alkyl, benzyl, trifluoromethyl, naphthyl or phenyl optionally substituted by radicals from the group composed of methyl, nitro and halogen.

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