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):
本发明涉及制备氧
吲哚和邻位取代
苯胺的过程,以及它们作为合成中间体的用途。该发明进一步涉及一种制备化合物的过程,该化合物的结构如下所示:其中
苯胺(化合物Q的结构)的混合物与
硫醚(化合物W的结构)在
氯化剂和有机溶剂存在下在高于-65°C的反应温度下反应。在随后的过程中,该化合物在酸催化剂存在下进一步反应,得到下述
吲哚(结构为7)或氧
吲哚(结构为8):