Cascade cyclization of alkyne-based Ugi adducts towards N-heterocycles

sponsorship: We acknowledge the FWO [Fund for Scientific Research-Flanders (Belgium)] for financial support (recipient E. V. V. d. E., supervision and writing) and the Research Council of the KU Leuven (recipient E. V. V. d. E., supervision and writing). This paper has been prepared with the support of the "RUDN University Strategic Academic Leadership Program" (recipient E. V. V. d. E., supervision and writing). (Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications, FWO [Fund for Scientific Research-Flanders (Belgium)], Research Council of the KU Leuven)