Under the assistance of beta-cyclodextrin, purine was effectively alkylated at N9 together with up to 99% conversion and good to excellent yield using water as the solvent. High regioselectivity-N9/N7 selectivity>99:1 was attributed to the beta-cyclodextrin cavity blocked the N7 of purines ring. (c) 2012 Elsevier Ltd. All rights reserved.
The Synthesis of Tenofovir and Its Analogues via Asymmetric Transfer Hydrogenation
A series of tenofovir analogues with potential antiviral and immunobiologically active compounds were synthesized through an asymmetric transfer hydrogenation reaction from achiral purine derivatives. Up to 97% ee and good to excellent yields were achieved under mild conditions through short reaction steps. The present report suggests an efficient process to acquire tenofovir and its analogues.