Palladium-Mediated Coupling Reactions of an Aminosubstituted Heterocycle. Direct Synthesis of C-Nucleosides Related to Adenosine
作者:Han-Cheng Zhang、Mohamed Brakta、G. Doyle Daves
DOI:10.1080/15257779508014656
日期:1995.2
C-Nucleosides of the pyrazolo[1,5-a]-1,3,5-triazine aglycon system have been prepared by palladium-mediated coupling of 8-iodopyrazolo[1,5-a]-1,3,5-triazines. 4-(N,N'-Diisobutyloxycarbonyl) amino-8-iodopyrazolo [1,5-a]-1,3,5-triazine and the furanoid glycal 1,4-anhydro-2-deoxy-3-O-[(1,1-dimethylethyl)diphenylsilyl]-D-erythro-pent-1-enitol coupled in the presence of catalytic palladium(0) to yield, after desilylation of the intermediate silyl enol ether, a C-glycoside analog of adenosine.