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    PROCESS FOR PREPARING AN ORTHO-SUBSTITUTED 5-HALOPHENOL AND A SYNTHESIS INTERMEDIATE THEREOF
    2.
    发明公开
    PROCESS FOR PREPARING AN ORTHO-SUBSTITUTED 5-HALOPHENOL AND A SYNTHESIS INTERMEDIATE THEREOF 有权
    PROCEDURE FOR AN的制备邻位取代的5-卤代苯酚类合成中间体THEREOF

    公开(公告)号：EP2574192A1

    公开(公告)日：2013-04-03

    申请号：EP10851578.4

    申请日：2010-05-19

    申请人： Rhodia (China) Co., Ltd. ,  Rhodia Operations

    发明人： MERCIER, Claude ,  DE CAMPO, Floryan ,  RIGHINI, Sébastien

    IPC分类号： C07C309/12 ,  C07C41/01 ,  C07C43/253

    CPC分类号： C07C303/28 ,  C07C41/26 ,  C07C303/30 ,  C07C309/66 ,  C07C43/23

    摘要： A process for preparing a 5-halophenol, ortho-substituted by an electron-donating group, is described. Also described, is a process for preparing a sulphonic ester of an ortho-substituted phenol, which is the synthesis intermediate for the ortho-substituted 5-halophenol. The process for preparing a phenol ortho-substituted by an electron-donating group and protected in the form of a sulphonic ester can include reacting a phenol ortho-substituted by an electron-donating group with a sulphonylating agent in the presence of a Lewis acid. The process for preparing a 5-halophenol ortho-substituted by an electron-donating group can include a first step of preparing a phenol ortho-substituted by an electron-donating group and protected in the form of a sulphonic ester, as described above; a second step of halogenating the protected phenol intermediate obtained in the preceding step, in the position para to the electron-donating group; and a third step of deprotecting the sulphonic ester function to hydroxyl.