DBU catalyzed metal free synthesis of fused 1,2,3-triazoles through [3+2] cycloaddition of aryl azides with activated cyclic C–H acids
作者:Harjinder Singh、Garima Khanna、Jitender M. Khurana
DOI:10.1016/j.tetlet.2016.05.082
日期:2016.7
DBU catalyzed synthesis of fused 1,2,3-triazoles by [3+2] cycloaddition of aryl azides with activated cyclic C–H acids such as dimedone, cyclohexane-1,3-dione, 5-methylcyclohexane-1,3-dione, and 2-hydroxynaphthalene-1,4-dione in PEG-400 has been reported under heating. The important features of this reaction are high yield products, short reaction times, easy availability of starting materials, and
Copper Acetate Catalyzed Regioselective Synthesis of Substituted 1,2,3-Triazoles: A Versatile Azide-Alkene Cycloaddition/Oxidation Approach
作者:Sandeep Rohilla、Shyam Sunder Patel、Nidhi Jain
DOI:10.1002/ejoc.201501301
日期:2016.2
A copperacetatecatalyzedoxidativecycloaddition reaction of benzyl and aryl azides with terminal and internal olefins that contain electron-withdrawing groups (COOR, CONH2, CN, CHO, COR) has been developed. The reaction employs air as the oxidant and does not require any base or additives to afford 1,4-disubstituted and 1,4,5-trisubstituted 1,2,3-triazoles in good to excellent yields with high regioselectivity