Valuable new synthetic intermediates, 4-, 5- or 6-chloromethyl-1H-indole-2-carboxylates, were prepared by the facile elimination of SO2 from 2-ethoxycarbonyl-1H-indole-4-, 5- or 6-methanesulfonic acids, respectively, easily accessible by Fischer-type indolization.
通过从2-乙氧基羰基-1 H-
吲哚-4-,5-或6轻松消除SO 2制备了有价值的新型合成中间体4-,5-或6-
氯甲基-1 H-
吲哚-2-羧酸-
甲磺酸分别可以通过费歇尔型
吲哚酸容易地获得。