Transition-metal-free [3 + 2] cycloaddition of <i>C</i>,<i>N</i>-cycloazomethylimines with <i>in situ</i> formed isocyanates from dioxazolones: a facile synthesis of triazolinones
Lei Chen, Peiyao Yang, Qiuying Wang, Zhongxiang Zhao, Hui Cui, Liping Zhu
Abstract
A novel strategy for synthesizing triazolinone with C , N -cycloazomethylimine and dioxazolone has been developed, in which the isocyanate formed in situ from dioxazolone is employed for cyclization instead of the widely used N -acyl nitrene.
Topics & Concepts
IsocyanateNitreneIn situCycloadditionTransition metalChemistryCombinatorial chemistryPolymer chemistryOrganic chemistryCatalysisPolyurethaneCatalytic C–H Functionalization MethodsSynthesis and Catalytic ReactionsCyclopropane Reaction Mechanisms