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    • 1. 发明授权
    • Benzimidazolyl-2-alkane-phosphonic acids
    • 苯并咪唑-2-烷 - 膦酸
    • US4278791A
    • 1981-07-14
    • US101977
    • 1979-12-10
    • Artur BottaHeinz-Joachim RotherGunther Teichmann
    • Artur BottaHeinz-Joachim RotherGunther Teichmann
    • C09C3/00B01F17/00B01F17/32C07F9/6506C09C3/08C23F11/167C09B23/14C07F9/28
    • B01F17/0064C07F9/65068C23F11/1676
    • A benzimidazolyl-2-alkane-phosphonic acid of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and denote hydrogen, lower alkyl, phenyl, halogen, trifluoromethyl, nitro or lower alkoxy, or together form a fused-on benzene ring,R.sup.3 denotes hydrogen, lower alkyl or phenyl or benzyl which is optionally substituted by lower alkyl or halogen andA denotes a straight-chain or branched, saturated or unsaturated bivalent hydrocarbon radical with 1 to 15 carbon atoms, which can be substituted by phenyl which is optionally substituted by lower alkyl or halogen or by carboxyl or the phosphonic acid group,and its salt with an inorganic or organic base or acid, and a method of preparing the same by contacting an o-arylene diamine of the formula ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 have the meaning given above, with a phosphonocarboxylic acid of the formula ##STR3## wherein Y denotes carboxyl, carbalkoxy, carbophenoxy, cyano, carbamido or carbochloride,R.sup.7 and R.sup.8 are identical or different and denote hydrogen, lower alkyl or phenyl, or together can form a ring, by means of an ethylene or propylene bridge, andA' denotes a straight-chain or branched, saturated or unsaturated bivalent hydrocarbon radical with 1 to 15 carbon atoms, which can be substituted by phenyl which is optionally substituted by lower alkyl or halogen or by Y or the group ##STR4## wherein Y, R.sup.7 and R.sup.8 have the abovementioned meaning, in the presence of an acid..The new benzimidazolyl-2-alkane-phosphonic acids are useful as anti-corrosion agents (corrosion inhibitors), as well as wetting agents for aqueous suspensions of pigments and fillers.
    • 其中R 1和R 2相同或不同,表示氢,低级烷基,苯基,卤素,三氟甲基,硝基或低级烷氧基,或一起形成稠合的苯环上的苯并咪唑基-2-烷烃 - 膦酸 ,R3表示氢,低级烷基或苯基或苄基,其任选被低级烷基或卤素取代,A表示具有1至15个碳原子的直链或支链,饱和或不饱和的二价烃基,其可被苯基 任选地被低级烷基或卤素取代,或被羧基或膦酸基团取代,及其与无机或有机碱或酸的盐,以及通过使下式的邻苯二胺与式 R 1,R 2和R 3具有上面给出的含义,其中Y表示羧基,烷氧基,羰基苯氧基,氰基,氨基甲酰基或碳酰胺,式中的膦酰基羧酸,R7和R8相同或不同 nd表示氢,低级烷基或苯基,或一起可以通过乙烯或丙烯桥形成环,A'表示具有1至15个碳原子的直链或支链,饱和或不饱和的二价烃基,其中 可以被任选被低级烷基或卤素取代的苯基或被Y取代的苯基或其中Y,R 7和R 8具有上述含义的基团在酸的存在下被取代。新的苯并咪唑-2-基烷 - 膦酸可用作防腐剂(腐蚀抑制剂),以及颜料和填料的水性悬浮液的润湿剂。