PROCESS FOR THE PREPARATION OF SUBSTITUTED BENZIMIDAZOLES

    公开(公告)号:EG11506A

    公开(公告)日:1977-11-30

    申请号:EG38973

    申请日:1973-10-09

    Applicant: HOECHST AG

    Inventor: DRANSCH G HORLEIN G

    Abstract: 1427416 2-Benzimidazole carbamic acid esters HOECHST AG 2 Oct 1973 [14 Oct 1972] 45985/73 Heading C2C Alkyl or benzyl esters of 2-benzimidazole carbamic acid or of a 5- and/or 6-substituted 2-benzimidazole carbamic acid or salts thereof, are obtained by converting 2-amino-benzimidazoles with bases to their alkali-metal or alkaline-earth metal salts, reacting these salts with carbonic acid esters in the absence of water and, if desired, converting the salts of 2-benzimidazole carbamates obtained to the free esters by acidification.

    9.
    发明专利
    未知

    公开(公告)号:SE403778B

    公开(公告)日:1978-09-04

    申请号:SE7313847

    申请日:1973-10-11

    Applicant: HOECHST AG

    Inventor: DRANSCH G HORLEIN G

    Abstract: 1427416 2-Benzimidazole carbamic acid esters HOECHST AG 2 Oct 1973 [14 Oct 1972] 45985/73 Heading C2C Alkyl or benzyl esters of 2-benzimidazole carbamic acid or of a 5- and/or 6-substituted 2-benzimidazole carbamic acid or salts thereof, are obtained by converting 2-amino-benzimidazoles with bases to their alkali-metal or alkaline-earth metal salts, reacting these salts with carbonic acid esters in the absence of water and, if desired, converting the salts of 2-benzimidazole carbamates obtained to the free esters by acidification.

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