Coupling of 6-chloropurines with organocuprates derived from grignard reagents: A convenient route to sec and tert 6-alkylpurines
作者:Hana Dvořáková、Dalimil Dvořák、Antonín Holý
DOI:10.1016/0040-4039(95)02375-5
日期:1996.2
Purine derivatives bearing a secondary or tertiary alkyl group at the 6-position can be conveniently prepared by CuI mediated reaction of secondary or tertiary Grignardreagents with 9-substituted 6-chloropurines under very mild conditions.
Synthesis of Acyclic Nucleotide Analogues Derived from 6-(sec- or tert-Alkyl)purines via Coupling of 6-Chloropurine Derivatives with Organocuprates
作者:Hana Dvořáková、Dalimil Dvořák、Antonín Holý
DOI:10.1135/cccc19982065
日期:——
Coupling of 9-[2-(diisopropyloxyphosphonylmethoxy)ethyl]-6-chloropurine (23) (and (R)-9-[2-(diisopropyloxyphosphonylmethoxy)propyl]-6-chloropurine (24), respectively) with organocuprates derived from Grignard reagents afforded after deprotection 6-(sec- or tert-alkyl) substituted phosphonates 31-36. As a model a series of 6-(sec- or tert-alkyl)purines 2-12 was also prepared.