A Direct and Divergent Entrance to Aza Heterocycles On 3-Amino Carbazole

The product-switchable reagent-controlled construction of 1,4-Dihydropyridines and stereo-structured amino dienes decorated with carbazole moieties have been realized via coupling of 3-amino-9-ethylcarbazole with benzaldehyde and methyl propiolate. Highly functionalized pyrido[3,2-b]carbazoles have been concisely synthesized in good yields via Et3N promoted single-pot assembly of 3-amino-9-ethylcarbazole with aryl/heteroaryl aldehydes and alpha-aryl-3-oxopropanenitrile. The structures of the synthesized products were confirmed by spectral data and elemental analysis.