Novel complex n-heterocycles via intramolecular 1,5-electrocyclizations: l,2,4,4a,5,5a,10-octahydropyrido[4",3":2',3']cyclobuta[1',2':4,5] pyrrolo[2,3-b]pyridines

Article abstract of DOI:10.3987/COM-98-8190

The synthesis of 2-amino-3-isopropenylpyridine (5) and 2-amino-5-chloro-3-isopropenylpyridine (6) and their toluenesulfonic acid catalyzed reactions in refluxing toluene with some 1-substituted piperidin-4-ones are described. The toluenesulfonic acid cata