Reaction conditions for mono- or di-substitution of the chloro substituents in 5,6-dichloro-2H-benzimidazole-2-spirocyclohexane (4) by various nucleophiles (RNH2, R2NH, RS-, RO-) are reported. Conversion of 4-morpholino-5-phenylsulphonyl-2H-benzimidazole-2-spirocyclohexane 17 into other heterocycles, 2,1,3-selenodiazole 19, benzimidazole 20, and quinoxaline 21 are also described.
报道了用各种亲核试剂(RNH2、R2NH、RS-、RO-)对5,6-二
氯-
2H-苯并咪唑-2-螺
环己烷(4)中的
氯取代基进行单取代或双取代的反应条件。还描述了将4-吗啉-5-苯磺酰基-
2H-苯并咪唑-2-螺
环己烷17转化为其他
杂环化合物,如2,1,3-
硒二氮杂环19、
苯并咪唑20和
喹喔啉21的过程。