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    11.
    发明专利
    未知

    公开(公告)号：DE2608517A1

    公开(公告)日：1976-09-16

    申请号：DE2608517

    申请日：1976-03-02

    Applicant: MONTEDISON SPA

    Inventor： RIBALDONE GIUSEPPE ,  BORSOTTI GIAMPIERO

    IPC: C09B13/00 ,  C07D221/18 ,  C07D491/048 ,  C07D491/06 ,  C09B5/02 ,  C07D491/04

    Abstract: New compounds are disclosed having the general formula: wherein R1, R2 and R3 may be the same or different and are selected from the class consisting of H, Cl and OCH3. They are useful as pigments. They are prepared by reacting a substituted or unsubstituted 1-aza-2-hydroxybenzanthrone with 2,3-dichloro-1,4-naphthoquinone, in the presence of pyridine, at a temperature between 80 DEG and about 120 DEG C.

    METHOD FOR THE PREPARATION OF 2-HYDROXYBENZATHRONE AND OF THE SUBSTITUTION DERIVATIVES THEREOF
    16.
    发明专利
    METHOD FOR THE PREPARATION OF 2-HYDROXYBENZATHRONE AND OF THE SUBSTITUTION DERIVATIVES THEREOF 未知

    公开(公告)号：CA1094060A

    公开(公告)日：1981-01-20

    申请号：CA255392

    申请日：1976-06-22

    Applicant: MONTEDISON SPA

    Inventor： RIBALDONE GIUSEPPE ,  BORSOTTI GIAMPIERO

    IPC: C07C49/587 ,  C07C45/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/12 ,  C07C233/76 ,  C09B3/04 ,  C09B3/02

    Abstract: A process is disclosed for the preparation of 2-hydroxy-benzanthrone and substituted derivatives thereof having the general formula: (I) wherein: R1 = H, OH R2, R3 = H, Cl, -OH, -OCH3, characterized in that an anthraquinone-1-diazonium salt is reacted with an olefinic compound of the formula: wherein X = CN or OCOCH3, in an alcoholic medium of a lower monovalent alcohol and in the presence of a catalytic quantity of cuprous chloride, at a temperature between 20.degree. and 100.degree.C, and that the reaction intermediate thus obtained is reacted successively with alkali in alcoholic solution. As the diazonium salt there is used an anthraquinone -1-diazonium sulphate prepared from : 1-amino-anthraquinone, 4-hydroxy-1-amino-anthra-quinone, 5-hydroxy-1-amino-anthraquinone, 5-methoxy-1-aminoanthra-quinone, 5-chloro-1-amino-anthraquinone, 6,7-dichloro-1-amino-anthraquinone, or 5-benzamido-1-aminoanthraquinone. Certain novel intermediates useful for the production of these 2-hydroxy-benzanthrone derivatives are disclosed, as well as certain novel dyes obtainable from the 2-hydroxybenzanthrone derivatives.

    N-ETHYL-N-(2-BUTENE-4-CYANO)-AMINO-BENZENES AND PROCESSES FOR PRODUCING SAME
    18.
    发明专利
    N-ETHYL-N-(2-BUTENE-4-CYANO)-AMINO-BENZENES AND PROCESSES FOR PRODUCING SAME 未知

    公开(公告)号：CA977367A

    公开(公告)日：1975-11-04

    申请号：CA155901

    申请日：1972-11-07

    Applicant: MONTEDISON SPA

    Inventor： RIBALDONE GIUSEPPE ,  BORSOTTI GIAMPIERO

    IPC: C07C20060101 ,  C07C255/30 ,  C09B20060101

    Abstract: A process for the preparation of compounds having the formula: ** (see formula) ** Wherein r is a hydrogen atom or the methyl group, characterized in that an N-ethyl-amino-benzene selected from N-ethyl-aniline and N-ethyl-m-toluidine is reacted with 1,4-dichloro-2-butene, according to a trans-1,4-dichloro-2-butene/n-ethyl-amino-benzene molar ratio equal to at least 5, at a temperature between 20º and 120ºC already the atmospheric pressure, in the presence of a neutralizing agent; by the fact that the reaction mass thus obtained is subjected to a first extraction with 0.5 normal hcl, selective for the extraction of the unreacted N-ethyl-benzene-benzene and of the di-substitution product, and the residue subjected to a second extraction with normal 2 hcl, selective for N-ethyl-N- (2-butene-4-chloro) -amino-benzene; due to the fact that from the normal hydrochloric acid solution thus obtained, N-ethyl-N- (2-butene-4-chloroaniline or, respectively, N-ethyl-n) are isolated after neutralization. - (2-butene-4-chloro) -m-toluidine according to known techniques, and are then transformed by cyanidation into N-ethyl-N- (2-butene-4-cyano) -aniline or, respectively, N- ethyl-N- (2-butene-4-cyano) -m-toluidine. (Machine-translation by Google Translate, not legally binding)

    19.
    发明专利
    未知

    公开(公告)号：DE2440233A1

    公开(公告)日：1975-02-27

    申请号：DE2440233

    申请日：1974-08-22

    Applicant: MONTEDISON SPA

    Inventor： RIBALDONE GIUSEPPE

    IPC: C07D221/18 ,  C09B5/14 ,  C07D221/22

    Abstract: A new process for preparing 3,3 - thio - bis[2-Methoxy-1-azabenzanthrone], a useful intermediate in the synthesis of dyestuffs, is disclosed. The process involves reacting 2-methoxy-1-azabenzanthrone with sulfur chlorides in suspension or solution in an inert solvent under heating, and recovering the reaction product from the reaction mass, e.g., by filtering.

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