Synthesis of New Functionally Substituted 9-Azabicyclo[4.2.1]nona-2,4,7-trienes by Cobalt(I)-Catalyzed [6π + 2π]-Cycloaddition of N -Carbocholesteroxyazepine to Alkynes. - Kadikova, Gulnara N.; D'yakonov, Vladimir A.; Dzhemilev, Usein M.; Bur, Scott K.; Wang, Qiu (Molecules, 2021)