Reduction of linear-trans-quinacridone-quinones, linear-trans-quinacridones thus obtained and linear-trans-6-hydroxy-quinacridone

    公开(公告)号:GB979136A

    公开(公告)日:1965-01-01

    申请号:GB1211861

    申请日:1961-04-05

    Applicant: BASF AG

    Abstract: Linear - trans - quinacridone - quinone and its 2 : 9-dihalo- and 2 : 9-dialkyl-derivatives are reduced using as reducing agents iron, copper, aluminium, nickel, zinc or an alloy or a mixture of the same in finely-divided form in the presence of (a) aqueous-alcoholic alkali metal hydroxide solution, (b) fused aluminium chloride, or (c) a mineral acid, any dihydroquinacridone obtained being subsequently oxidized. The use of copper or a copper alloy in the presence of a mineral acid is limited to the reduction of the unsubstituted quinacridonequinone. The products obtained are the corresponding linear-trans-quinacridones except when copper or a copper alloy and a mineral acid are used when the product is linear-trans-6-hydroxy-quinacridone. The invention also comprises linear-trans-6-hydroxy-quinacridone. Examples are given. Specifications 828,051, 828,052, 871,976, 896,803 and 911,881 are referred to.

Patent Agency Ranking