The first examples of a bowl-shaped tricyclic nitrogen–sulfur analogue of the tri-pentagon bowl are reported; substituted 5,6,7,7a-tetrahydropyrrolo[2,1-b]-1,3,4-thiadiazole-endo-6,7-dicarboxyimides are synthesised by a relatively simple route.
![Graphical abstract: A new tricyclic ring and a nitrogen–sulfur analogue of the tri-pentagon bowl. Substituted 5,6,7,7a-tetrahydropyrrolo[2,1-b]-1,3,4-thiadiazole-endo-6,7-dicarboxyimides](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=B105190N&imageInfo.ImageIdentifier.Year=2001)
A new tricyclic ring and a nitrogen–sulfur analogue of the tri-pentagon bowl. Substituted 5,6,7,7a-tetrahydropyrrolo[2,1-b]-1,3,4-thiadiazole-endo-6,7-dicarboxyimides
R. N. Butler, G. M. Smyth, M. O. Cloonan, P. McArdle and D. Cunningham, Chem. Commun., 2001, 1950 DOI: 10.1039/B105190N
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