H. Kumamoto et al., SYNTHESIS OF 2-ALKYNYLCORDYCEPINS AND EVALUATION OF THEIR VASODILATING ACTIVITY, Nucleosides & nucleotides, 17(1-3), 1998, pp. 15-27
Based on the recently developed lithiation-mediated stannyl migration
of 6-chloropurine derivatives, 2-iodocordycepin was prepared from cord
ycepin. The reaction of this compound with terminal alkynes was carrie
d out to synthesize a series of 2-alkynyl derivatives. The vasodilatin
g effect of these compounds was evaluated.