Metal Free Access to Polysubstituted Pyrimidines via Nitrile Activation and [2+2+2] Cycloaddition
Jinkui Chai, Yu Nie, Zhao Wang, Cheng Li, Yibo Liu, Junliang Wu
Abstract
Abstract Tf 2 O mediated intermolecular / intramolecular [2+2+2] cycloaddition between alkynes and nitriles has been developed for efficient construction of polysubstituted pyrimidines and bicyclopyrimidines. In presence of Tf 2 O, aza‐allene species were generated in situ through nitrile activation and subsequently participated in the [2+2+2] cycloaddition, which was fully supported by deuteration experiments. The reaction had good substrate extensibility with moderate to excellent yield including trimethylsilylalkynes. The method was utilized as a synthetic tool in the preparation of a luminescent metal complex.
Topics & Concepts
CycloadditionNitrileIntramolecular forceChemistryAlleneIntermolecular forceCombinatorial chemistryYield (engineering)Substrate (aquarium)PhotochemistryOrganic chemistryCatalysisMoleculeMaterials scienceBiologyEcologyMetallurgyChemical Synthesis and AnalysisCatalytic C–H Functionalization MethodsSynthesis and Catalytic Reactions