support from the Natural Science Foundation of Henan Province(grant no.212300410152);the Key Scientific and Technological Project of Henan Province(grant no.212102110439);Henan University of Animal Husbandry and Economy(grant no.2019HNUAHEDF011 and XKYCXJJ2020006);the Key Scientific Research Project for Colleges and Universities of Henan Province(grant no.22B150005)。
A novel and efficient[3+2]annulation of 2-substituted aziridines and N-tosyl cyanamides via a dominoregioselective ring-opening/5-exo-dig cyclization procedure has been developed,allowing the directpreparation of N_(2...