作者:B. Saroja、P. C. Srinivasan
DOI:10.1055/s-1986-31763
日期:——
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。