Mathematical Models and Computer Simulations. Pleiades Publishing. Том 9. 2017. С. 339-348
[Figure not available: see fulltext.] 1-Tetrazolyl-substituted tetrahydro-β-carbolines undergo a reaction with activated alkynes (acetylacetylene, methyl propiolate, and dimethyl acetylenedicarboxylate) over 4–8 days in MeOH or 1 day in CF3CH2OH with the formation of multicomponent mixtures, from which spiro[indole-3,4'-pyridines] were isolated chromatographically. Additionally, two azocino[5,4-b]indoles were isolated from methyl propiolate and acetylacetylene reactions. © 2017, Springer Science+Business Media, LLC.