TANDEM MICHAEL ADDITION - HOFFMAN ELIMINATION SEQUENCE OF DMAD ON TETRAHYDROPYRROLO[3,2-C]PYRIDINES. NEW ROUTE TO VINYLPYRROLES. СтатьяVarlamov A.V., Borisova T.N., Voskressensky L.G., Nsabimana B., Chernyshev A.I.Heterocyclic Communications. Том 7. 2001. С. 461-466