Synthesis of 5′,8-cyclopurine and of 5′,6-cyclodihydropyrimidine nucleosides using intramolecular radical cyclisation based on the aryl telluride radical exchange process.
作者:Derek H.R. Barton、Stephane D. Géro、Quiclet-Sire Béatrice、Mohammad Samadi、Claire Vincent
DOI:10.1016/s0040-4020(01)80885-1
日期:1991.11
C-cyclopurine and C-cyclodihydropyrimidine nucleosides has been effected using 5′-aryltelluronucleosides. Generation of methyl radicals from the photolysis of the acetyl derivative of N-hydroxy-2-thiopyridone permitted, by radical exchange, the formation of 5′-nucleoside radicals which cyclized in satisfactory yields.
C-环嘌呤和C-环二氢嘧啶核苷的合成已使用5'-芳基tellurourosidesides进行。通过N-羟基-2-硫代吡啶酮的乙酰基衍生物的光解反应生成甲基自由基,可以通过自由基交换形成5'-核苷自由基,并以令人满意的产率进行环化。