Oxindole was found to react readily with thionyl chloride to give (in an excellent yield) the isolable sulfine (13a), which on heating (refluxing acetonitrile) gave isoindigo (15a). The dark violet 3‐sulfinato‐oxindole (13a) readily reacted with 2,3‐dimethylbutadiene to give a colorless cyclo‐adduct (14a). The sulfine also reacted readily with various nucleophilic reagents, thus, thioloacetic acid
发现羟
吲哚易于与亚
硫酰氯反应,以优异的产率得到可分离的亚砜(13a),将其加热(回流
乙腈)得到
异靛蓝(15a)。暗紫色的3-
磺胺基-
吲哚(13a)易于与
2,3-二甲基丁二烯反应,得到无色的环加合物(14a)。
硫磺也容易与各种亲核试剂反应,因此,
硫代乙酸可生成3-羧甲基
硫代-羟
吲哚(23a)。J.杂环化学。(2010)。