Copper catalyzed arylation with boronic acids for the synthesis of N1-aryl purine nucleosides
摘要:
The synthesis of a series of N-1-aryl inosine and guanosine derivatives is described. The procedure for chemoselective N-1-arylation involves the mild oxidative copper(II) mediated coupling with boronic acids. This approach provides access to substituted N-1-aryl purines with interesting structural characteristics and novel scaffolds for drug discovery. (c) 2005 Elsevier Ltd. All rights reserved.
2',3',5'-Tri-O(tetrahydropyran-2-yl)inosine 1 was treated with iodobenzene or 2-bromopyridine in the presence of cuprous oxide in pyridines to give the N-1-aryl derivatives 2a,b. Deprotection of the products afforded N-1-arylinosines 3a,b.