Photochemical synthesis of 1,2,4-triazoles<i>via</i>addition reaction of triplet intermediates to diazoalkanes and azomethine ylide intermediates
Bao‐Gui Cai, Ye‐Peng Bao, Chao Pei, Qian Li, Lei Li, René M. Koenigs, Jun Xuan
Abstract
Photoexcitation of the azodicarboxylates results in a radical addition reaction with diazoalkanes and formation of an azomethine ylide to allow for dipolar cycloaddition reaction with nitriles to give a 1,2,4-triazole.
Topics & Concepts
ChemistryCycloadditionPhotochemistryCarbeneReactive intermediateReactivity (psychology)Reaction intermediateReaction mechanismYlideAzomethine ylide1,3-Dipolar cycloadditionStereochemistryOrganic chemistryCatalysisMedicinePathologyAlternative medicineCyclopropane Reaction MechanismsFluorine in Organic ChemistrySynthesis and Catalytic Reactions