A new and efficient route to the synthesis of pyrazole and pyrimidine C-nucleoside derivatives
作者:Augusto C Veronese、Carlo F Morelli
DOI:10.1016/s0040-4039(98)00631-5
日期:1998.5
A new route to the synthesis of pyrazole and pyrimidine C-nucleosides, involving as the key step a metal catalysed reaction of β-D-ribofuranosyl ketoesters with alkyl cyanoformates, is described, 2,3,5-Tri-O-benzoyl-β-D-ribofuranosyl cyanide (1) reacts with α-bromoesters, in the presence of zinc dust, to give β-D-ribofuranosyl-enaminoesters 2 which are easily hydrolised to β-ketoesters 3. The reactions