Straightforward C-8 alkylation of adenosine analogues with tetraalkyltin reagents
作者:Petros Mamos、Arthur A. Van Aerschot、nancy J. Weyns、Piet A. Herdewijn
DOI:10.1016/s0040-4039(00)74226-2
日期:1992.4
A one step synthesis of the 8-methyl-, 8-ethyl -and 8-vinyl derivatives of adenosine, 2′-deoxyadenosine and 2′,3′-dideoxyadenosine starting from the readily available 8-bromo congeners is described. This reaction makes use of a transient silylation procedure and a Pd(0) catalysed cross-coupling with tetraorganotin reagents.
In this report, we present the synthesis of N8-glycosylated 8-aza-2-methylhypoxanthine and 8-aza-6-thiohypoxanthine 2'-deoxynucleosides as well as methylated 2'-deoxynebularine derivatives. In vitro base pairingproperties between each modified and canonical nucleobase were studied. As demonstrated by Tm, incorporation of the modified bases in DNA resulted, with few exceptions, in low stability of
Convenient method for the synthesis of C-alkylated purine nucleosides: palladium-catalyzed cross-coupling reaction of halogenopurine nucleosides with trialkylaluminums
Antiviral activity of C-alkylated purine nucleosides obtained by cross-coupling with tetraalkyltin reagents
作者:Arthur A. Van Aerschot、Petros Mamos、Nancy J. Weyns、Satoru Ikeda、Erik De Clercq、Piet A. Herdewijn
DOI:10.1021/jm00072a013
日期:1993.10
2-, 6-, And 8-alkylated (methyl, ethyl, and vinyl) adenosine analogues were synthesized by a palladium-catalyzed cross-coupling of a tetraalkyltin with the halogenated purine nucleosides. The synthesis of the 8-substituted analogues was accomplished using a transient protection procedure. The 6-alkylated-9-beta-D-ribofuranosylpurines as well as 2-ethyladenosine were cytotoxic at relatively low concentrations