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    Aromatic azomethines
    5.
    发明授权
    Aromatic azomethines 失效
    芳香族偶氮甲碱

    公开(公告)号：US3892807A

    公开(公告)日：1975-07-01

    申请号：US42701673

    申请日：1973-12-13

    Applicant: HOECHST AG

    Inventor： SAHM WILFRIED

    IPC: C07D307/78 ,  B01J10/00 ,  C07D307/77 ,  C07D307/79 ,  C07D307/80 ,  C07D307/87 ,  C07D307/92 ,  C07D407/02 ,  C07D409/06 ,  C07D413/04 ,  C09B57/00 ,  D06L3/12 ,  C07C119/00

    CPC classification number: C07D307/77

    Abstract: Novel azomethines are obtained when reacting a tertiary amine with an aromatic aldehyde or ketone having in orthoposition an activated methoxy group. These azomethines are capable of ring closure to yield a benzofurane and said tertiary amine. The benzofuranes are optical brighteners tranquilizers or intermediates for optical brighteners, fluorescent dyestuffs, scintiallators, sensibilizers for electrophotographic coatings.

    Abstract translation: 当叔胺与具有活性甲氧基定位的芳族醛或酮反应时，获得新的偶氮甲碱。 这些偶氮甲碱能够闭环以产生苯并呋喃和所述叔胺。 苯并呋喃是荧光增白剂镇定剂或荧光增白剂中间体，荧光染料，闪烁仪，用于电子照相涂料的敏化剂。

    8.
    发明专利
    未知

    公开(公告)号：NO137898B

    公开(公告)日：1978-02-06

    申请号：NO288872

    申请日：1972-08-11

    Applicant: HOECHST AG

    Inventor： SAHM WILFRIED ,  SCHINZEL ERICH ,  ROESCH GUENTER

    IPC: C08K5/00 ,  C07D307/77 ,  C08K5/1535 ,  C08K5/16 ,  C08K5/41 ,  C08L67/00 ,  C08L77/00 ,  C09B57/00 ,  C11D3/40 ,  C07D307/79 ,  D06L3/12

    Abstract: 1399509 Bis-benzofuran derivatives HOECHST AG 11 Aug 1972 [13 Aug 1971] 37574/72 Heading C2C [Also in Division C3] The invention comprises compounds of the formula wherein A and A 1 each represents an aromatic, mono- or polynuclear ring system in which two adjacent C atoms are linked to the furan nucleus as indicated, R and R 1 each represents H, halogen, C 1 to C 4 alkyl, phenyl which may be substituted by C 1 to C 4 alkyl or alkoxy, halogen or COOH or SO 3 H or their functional derivatives, and B represents a continuously conjugated chain of C atoms, which may be completely or partly a constituent of a carbocyclic or heterocyclic ring system and which is conjugated with the adjacent double bonds of the two furan nuclei ; the ring systems A and A 1 may bear one or more non-chromophoric substituents. They may be obtained by (I) condensing intramolecularly a compound of the formula (II) condensing, intramolecularly, a compound of the formula wherein B 11 is a continuously conjugated chain of C atoms, (III) condensing, intermolecularly, a compound of the formula with a compound of the formula wherein D and E represent direct bonds or are continuously conjugated chains of C atoms which may be completely or partly constituents of a carbocyclic or heterocyclic ring system and which are conjugated with the adjacent double bonds of the furan nucleus, and R 6 represents an alkyl, cycloalkyl, aralkyl or aryl radical ; and (IV) condensing, intramolecularly, a compound of the formula whereby the radical B 11 migrates to the 2- position of the furan rings. Examples are given for the preparation of the compounds. They are useful as optical brightening agents. Compounds of Formula IV are obtained by reacting compounds of formula wherein M is an alkali or alkaline earth metal, with compounds of the formula wherein X is the anion of an inorganic acid.

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