1-Phenylsulfonyl-3-vinylindole can be prepared in good yield from the 3-ethyl derivative by a two-step bromination dehydrobromination sequence, As a 1,3-diene it undergoes [4+2]-cycloadditions with N-phenylmaleimide, p-benzoquinone, and dialkyl acetylenedicarboxylates to give derivatives of the 1,2,3,3a,4,5,10,10b-octahydropyrrolo[3,4-a]carbazole, 1,4,4a,5,6,11b-hexahydro-11H-benzo[a]carbazole, and carbazole ring systems, respectively.
1-苯磺酰基-3-
乙烯基吲哚可通过两步
溴化脱
溴序列从3-乙基衍
生物中制备,收率较高。作为1,3-二烯,它与N-苯基马来
酰亚胺、
对苯醌和二烷基
乙炔二
羧酸酯发生[4+2]环加成反应,分别得到1,2,3,3a,4,5,10,10b-八氢
吡咯并[3,4-a]
咔唑、1,4,4a,5,6,11b-六氢-11H-苯并[a]
咔唑和
咔唑环系统的衍
生物。