Mitsunobu Reactions for the Synthesis of Carbocyclic Analogues of Nucleosides: Examination of the Regioselectivity<sup>1</sup>
作者:Akemi Toyota、Nobuya Katagiri、Chikara Kaneko
DOI:10.1080/00397919308011216
日期:1993.5
In order to provide a general synthetic method for carbocyclic nucleosides, regioselectivities in Mitsunobu reaction of purine, pyrimidin-2-one and their substituted derivatives with a variety of alcohols were examined and found to depend upon both substituents of the bases and kind of the alcohols.
Regioselective alkylation reaction of purines under microwave irradiation
The alkylation of purines which is generally carried out after anion formation by treatment with a base and alkyl halide is complicated and in the best cases, mixtures of N-alkylated compounds are obtained. Purine derivatives can be acquired from alkylation at N-7 and N-9. In this work, the reaction conditions have been optimized to obtain the alkylation products of N-9 regioselectively. Different