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7 records (took 0.019 seconds)

    1.
    发明专利
    未知

    公开(公告)号：IT7820095D0

    公开(公告)日：1978-02-09

    申请号：IT2009578

    申请日：1978-02-09

    Applicant: MONTEDISON SPA

    Inventor： CARLO VENTURELLO ,  RINO D ALOISIO ,  ALDO BELLI

    IPC: C07C205/56 ,  C07C

    Abstract: The present invention concerns a process for the preparation of 2-(4'-nitrophenyl)-propionic acid of the formula (I): (I) More particularly, this invention relates to a process for the preparation of 2-(4'-nitrophenyl)-propionic acid (I) starting from para-nitroethylbenzene (PNEB) by carboxylation in the presence of alkaline phenates (Na and K). The 2-(4'-nitrophenyl)-propionic acid (I) thus obtained finds a useful application as an intermediate for the preparation of chemical products. For instance, acid (I) may be hydrogenated catalytically until obtaining the corresponding amino-derivative which is then condensed with ortho-cyanobenzyl-bromides in order to give isoindoline (as described in Belgian Pat. No. 774985).

    PROCESS FOR THE PREPARATION OF 2-CARBOXYPYRAZINES 4-OXIDE
    2.
    发明专利
    PROCESS FOR THE PREPARATION OF 2-CARBOXYPYRAZINES 4-OXIDE 未知

    公开(公告)号：GR861268B

    公开(公告)日：1986-09-12

    申请号：GR860101268

    申请日：1986-05-15

    Applicant: MONTEDISON SPA

    Inventor： CARLO VENTURELLO ,  RINO ALOISIO D

    IPC: C07D241/52 ,  C07D241/24

    Abstract: A process for the preparation of 2-carboxypyrazine 4-oxides having the formula (I)wherein R 1 , R 2 and R 3 , which may be the same or different, represent a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms, by oxidation of the corresponding 2-carboxypyrazines. The 2-carboxypyrazines are reacted under stirring with an aqueous solution of H 2 O 2 , at a pH ranging between 0.5 and 5, in the presence of a catalyst selected from the group consisting of tungstic acid, a homopolytungstic acid, a heteropolytungstic acid, molybdic acid, a homopolymolybdic acid, a heteropolymolybdic acid, and an alkali metal salt thereof.

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