PROCESS FOR THE PREPARATION OF OXINDOLES AND ORTHO-SUBSTITUTED ANILINES AND THEIR USE AS INTERMEDIATES FOR SYNTHESES
申请人:Ford Mark James
公开号:US20110118478A1
公开(公告)日:2011-05-19
The present invention relates to processes for the preparation of oxindoles and ortho-substituted anilines and their use as intermediates for syntheses. The invention further relates to a process for the preparation of compounds of formula (4):
where a mixture of an aniline (compound of formula Q) is reacted with a thioether (compound of formula W):
in the presence of a chlorinating agent and an organic solvent at a reaction temperature in the range above −65° C.
In a subsequent process, this compound is further reacted in the presence of an acid catalyst to give the indole of formula (7) or the oxindole of formula (8):