Abstract
An efficient protocol for the synthesis of substituted 1,2,3‐triazol‐9H‐purines via copper (I)‐catalyzed click chemistry of 2,6‐dichloropurine with aromatic azide has been reported. A wide range of 1,4‐disubstituted triazoles (N‐9 substituted purines) was accessible in good‐to‐excellent yields with remarkable functional group tolerance. The base‐catalyst ratio was tuned to achieve optimum reaction condition (>95% conversion and purity in most cases). Furthermore, the structure of 4i has been unambiguously assigned by X‐ray crystallographic study to yield structural information on the 1,3‐dipoles entering the reaction.
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