Process for preparing compounds of the benzothioxanthene series

    公开(公告)号:US3828072A

    公开(公告)日:1974-08-06

    申请号:US27018872

    申请日:1972-07-10

    申请人: HOECHST AG

    IPC分类号: C09B5/24 C09B57/14

    CPC分类号: C09B57/14 C09B5/2427

    摘要: PROCESS FOR PREPARING COMPOUNDS OF THE BENZOTHIOXANTHENE SERIES, WHEREIN CIOMPOUNDS OF THE 1-(2''-AMINOPHENYLMERCAPTO)-NAPHTHALENE SERIES OR OF THE 1-PHENYLMERCAPTO=8-AMINONAPHTHALENE SERIES ARE REACTED IN TERTIARY AMINES WITH COMPOUNDS YIELDING NITROSYL GROUPS AND THE DIAZNIUM COMPOUNDS SO OBTAINED ARE HEATED. THIS PROCESS IS SUITED FOR ALL COMPOUNDS WHICH CONTAIN THE BENZOTHIOXANTHENE RING, INDEPENDENTLY OF THEIR SUBSTIUENTS. THE PRODUCTS OBTAINED BY THIS PROCESS HAVE A MARKEDLY HIGHER PURITY AND ARE OBTAINED IN A HIGHER YIELD AS COMPARED TO OTHER PROCESSES.