Direct Synthesis of 6-Arylpurines by Reaction of 6-Chloropurines with Activated Aromatics
摘要:
Highly functionalized C6-aryl-substituted purine analogues were synthesized through direct arylation of 6-chloropurine with aromatics promoted by anhydrous AlCl(3) in a single step. The reactions, which were conducted using a 3-fold excess of AlCl(3) in refluxing 1,2-dichloroethane, gave moderate to excellent product yields in 0.5 h. This work is complementary to the classical coupling reactions for the synthesis of C6-aryl-substituted purine analogues.
[EN] HETEROCYCLIC NITROGEN-CONTAINING PURINE DERIVATIVES, PHARMACEUTICAL PREPARATIONS CONTAINING THESE DERIVATIVES AND THEIR USE IN NEUROPROTECTION<br/>[FR] DÉRIVÉS DE PURINE CONTENANT DE L'AZOTE HÉTÉROCYCLIQUE, PRÉPARATIONS PHARMACEUTIQUES CONTENANT CES DÉRIVÉS ET LEUR UTILISATION EN NEUROPROTECTION
申请人:UNIV PALACKEHO
公开号:WO2020164648A1
公开(公告)日:2020-08-20
The invention relates to heterocyclic nitrogen-containing purine derivatives, their use in the medicinal applications and compositions containing these derivatives. New generation of compounds possess selective antineurodegenerative properties on neuronal cells and tissues and can be particularly used in the treatment and prophylaxis of neurodegenerative disease, particularly in the treatment and prophylaxis of Parkinson's disease.
Novel C6-phosphonated purine nucleosides were obtained in good to excellent isolated yields by the simple and catalyst-free SNAr−Arbuzov reaction of trialkyl phosphite with 6-choloropurine nucleosides, including a series of nonsugar carbon nucleosides. Shorter reaction times were needed, and substantially higher yields were obtained under microwave irradiation conditions compared with conventional